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Hi, I'm bill pullman.
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00:00:03,203 --> 00:00:06,371
For nearly 30 years, my family's owned a ranch in montana,
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00:00:06,382 --> 00:00:09,133
Not far from yellowstone national park.
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00:00:09,209 --> 00:00:10,384
And visiting the park
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00:00:10,461 --> 00:00:13,220
Is an experience I never take for granted.
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00:00:13,297 --> 00:00:16,465
I'm not the only one drawn to yellowstone.
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00:00:16,475 --> 00:00:18,884
Millions of people visit here every year,
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00:00:18,894 --> 00:00:22,646
But very few come in winter, the most extreme season,
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00:00:22,723 --> 00:00:26,475
When animals are pushed to their limits.
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00:00:26,485 --> 00:00:27,985
What you're about to experience
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00:00:28,062 --> 00:00:30,571
Is yellowstone as it's rarely seen--
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00:00:30,647 --> 00:00:33,315
When the geothermal heat of the geysers and hot springs
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00:00:33,325 --> 00:00:35,826
Draws wildlife to shelter
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00:00:35,903 --> 00:00:38,078
In the heart of the park.
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00:00:38,205 --> 00:00:40,080
This is the gripping drama,
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00:00:40,157 --> 00:00:44,084
The real magic of winter in yellowstone.
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00:00:46,246 --> 00:00:50,215
There is a sound that signals the coming of winter.
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00:00:52,419 --> 00:00:55,587
A clash that echoes through yellowstone.
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00:01:06,100 --> 00:01:10,685
Bighorn rams do battle
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00:01:10,696 --> 00:01:13,322
And fight for the right to breed.
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00:01:15,117 --> 00:01:17,868
But it's only the beginning...
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00:01:17,945 --> 00:01:21,121
The first trial of the season,
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00:01:21,332 --> 00:01:24,116
For winter in yellowstone
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00:01:24,126 --> 00:01:26,043
Is like nowhere else on earth.
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00:01:39,475 --> 00:01:43,727
A collision of mighty forces.
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00:01:45,973 --> 00:01:46,980
Fire...
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00:01:49,893 --> 00:01:51,235
And ice.
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00:01:54,281 --> 00:01:55,697
Magnificent...
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00:01:57,243 --> 00:01:59,159
Yet brutal.
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00:02:02,248 --> 00:02:05,332
Some flee its fury.
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00:02:05,409 --> 00:02:09,169
Only the toughest can survive the bitterness to come.
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00:02:13,500 --> 00:02:17,344
This is yellowstone in winter,
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Like never seen before.
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Winter's first big storm
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00:02:48,377 --> 00:02:51,295
Blankets
yellowstone national park.
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00:03:21,160 --> 00:03:22,492
The bobcat,
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00:03:22,569 --> 00:03:25,495
Named for his short bobbed tail,
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00:03:25,572 --> 00:03:28,916
Isn't built for deep snow.
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00:03:28,992 --> 00:03:33,337
Small paws don't support the cat's weight,
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00:03:33,413 --> 00:03:35,631
And he sinks into the drifts.
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00:03:38,085 --> 00:03:42,679
The stealthy hunter becomes slow, inefficient.
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00:03:49,480 --> 00:03:51,271
Bobcats usually avoid
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00:03:51,357 --> 00:03:53,431
The snowiest regions of yellowstone
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00:03:53,442 --> 00:03:55,525
When winter arrives.
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00:03:57,529 --> 00:04:01,949
But this cat may have been lured by an unusual opportunity.
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00:04:14,713 --> 00:04:16,588
Open water.
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00:04:18,717 --> 00:04:21,426
An oasis in a frozen world.
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00:04:24,715 --> 00:04:26,556
The madison river is warmed
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00:04:26,633 --> 00:04:31,812
By yellowstone's famous geysers and hot springs.
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00:04:31,888 --> 00:04:35,816
Even in the cold, it flows easily.
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00:04:41,648 --> 00:04:45,325
It becomes a refuge for waterfowl...
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00:04:48,747 --> 00:04:52,040
Who, in turn, attract the bobcat.
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00:04:55,546 --> 00:05:00,665
Bobcats are not by habit creatures of the water.
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00:05:00,676 --> 00:05:04,336
They're elusive hunters.
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00:05:04,346 --> 00:05:05,929
Rarely seen.
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00:05:07,841 --> 00:05:11,351
But the hungry cat must try his luck here,
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00:05:11,428 --> 00:05:13,478
In the open.
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00:05:31,114 --> 00:05:36,034
The bobcat moves towards what must be a tempting sight--
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00:05:36,045 --> 00:05:39,671
Mallard ducks, within striking distance.
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00:05:46,129 --> 00:05:51,391
The cat's bold approach should concern the ducks.
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00:05:51,468 --> 00:05:54,269
But they don't panic.
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00:05:59,476 --> 00:06:03,487
With a quick paddle, they're easily out of range.
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00:06:07,734 --> 00:06:11,745
The bobcat is left with a puzzle.
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00:06:11,822 --> 00:06:14,164
He'll try a different strategy.
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00:06:16,493 --> 00:06:20,420
Hide and wait.
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00:06:20,497 --> 00:06:22,714
Let the ducks come to him.
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00:06:27,671 --> 00:06:30,347
But an unexpected target surfaces.
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00:06:38,649 --> 00:06:40,399
A muskrat...
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00:06:44,521 --> 00:06:50,358
Blissfully unaware of the unlikely stalker.
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00:07:18,564 --> 00:07:21,898
A mouthful of river muck is no prize.
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00:07:33,704 --> 00:07:37,622
In this cold, water is the cat's enemy.
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00:07:38,834 --> 00:07:42,502
The only thing worse than being hungry
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00:07:42,588 --> 00:07:44,504
Is being hungry and wet.
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00:07:54,349 --> 00:07:59,019
The seeming bounty of the river has delivered disappointment.
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00:08:01,765 --> 00:08:05,525
But it's too late for the bobcat to change course
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00:08:05,736 --> 00:08:07,694
To escape the snow.
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00:08:11,700 --> 00:08:15,035
The river is all he has.
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00:08:15,111 --> 00:08:19,197
If he's going to survive winter in yellowstone,
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00:08:19,208 --> 00:08:23,460
He must find a way to outwit the ducks.
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00:08:29,718 --> 00:08:32,710
It's easy to imagine yellowstone,
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00:08:32,721 --> 00:08:35,555
The world's first national park,
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00:08:35,682 --> 00:08:40,560
As a protected paradise for wildlife.
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00:08:40,771 --> 00:08:44,305
Its boundaries preserve iconic landscapes
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Of the rocky mountain west.
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00:08:47,644 --> 00:08:52,739
Its peaks soar beyond 10,000 feet.
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00:08:52,816 --> 00:08:56,576
Its heart holds the world's largest concentration
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00:08:56,653 --> 00:08:58,903
Of geothermal features,
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00:08:58,914 --> 00:09:03,833
Fueled by a giant supervolcano
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00:09:03,910 --> 00:09:08,672
Lurking just beneath the earth's crust.
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00:09:08,748 --> 00:09:11,416
Its beauty is fearsome.
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00:09:23,522 --> 00:09:25,438
But on many days,
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00:09:25,515 --> 00:09:30,193
Yellowstone is the coldest place in the lower 48 states.
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00:09:39,621 --> 00:09:42,697
Snow begins to fall in September
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00:09:42,708 --> 00:09:45,125
And can last through may.
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00:10:07,974 --> 00:10:11,276
December is the coldest month in yellowstone.
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00:10:13,822 --> 00:10:14,988
The average low
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Hovers just above zero degrees fahrenheit.
124
00:10:20,871 --> 00:10:24,205
And temperatures can plummet below negative 50.
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00:10:31,757 --> 00:10:34,332
Even trumpeter swans,
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00:10:34,343 --> 00:10:38,678
Drawn to the refuge of yellowstone's open waters,
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00:10:38,805 --> 00:10:43,266
Are tested on these most severe days.
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00:10:53,436 --> 00:10:57,364
Less than one percent of the park's annual visitors
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00:10:57,440 --> 00:10:59,115
Brave the cold.
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00:11:02,788 --> 00:11:06,706
Most of yellowstone's roads are closed,
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00:11:06,833 --> 00:11:08,950
Buried in the drifts.
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00:11:08,960 --> 00:11:11,795
Oversnow travel becomes the only way
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00:11:11,871 --> 00:11:15,048
To access the interior of the park.
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00:11:19,054 --> 00:11:23,306
Snowmobiles carry travelers through a glittering wonderland.
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00:11:29,898 --> 00:11:34,642
Ghost trees hover over them,
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00:11:34,653 --> 00:11:39,230
Created when geothermal steam freezes on limbs and boughs.
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00:11:46,331 --> 00:11:50,908
Cross country skiers glide across snow-covered boardwalks
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00:11:50,919 --> 00:11:54,462
That in summer would be crowded with tourists.
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00:11:58,501 --> 00:12:03,513
But perhaps the most magical moments of a winter visit
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00:12:03,590 --> 00:12:05,932
Are experienced in stillness.
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00:12:11,022 --> 00:12:15,984
Those who come in winter are rewarded with the rarest scenes.
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00:12:19,773 --> 00:12:21,698
Yellowstone's marvels,
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00:12:21,775 --> 00:12:24,617
Framed by the wonder of the season.
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00:12:32,043 --> 00:12:36,287
Winter's first deep freeze
is so extreme
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That it produces
a rare spectacle.
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[bird calling]
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Diamond dust.
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♪
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00:12:59,905 --> 00:13:03,823
It appears when temperatures
fall so low
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00:13:03,950 --> 00:13:07,243
That the water vapor in the air
crystallizes.
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00:13:09,906 --> 00:13:15,168
Tiny rods of ice
precipitate in the clear air
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00:13:15,245 --> 00:13:19,172
And glitter
as they scatter sunlight.
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00:13:24,921 --> 00:13:28,014
This phenomenon
is more typically seen
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00:13:28,091 --> 00:13:31,851
In the most frigid place
on earth--
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00:13:31,928 --> 00:13:34,103
Antarctica.
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00:13:34,180 --> 00:13:42,362
♪
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00:13:42,438 --> 00:13:46,115
The sparkle of diamond dust
is alluring.
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00:13:47,777 --> 00:13:52,029
But the conditions
that create it mean trouble.
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00:13:52,040 --> 00:14:06,460
♪
164
00:14:06,471 --> 00:14:13,309
♪
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00:14:13,386 --> 00:14:15,228
It's January.
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00:14:15,305 --> 00:14:20,141
The cold snap has frozen
yellowstone's northern regions.
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00:14:20,151 --> 00:14:22,944
Open water is now scarce.
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00:14:25,073 --> 00:14:29,158
One family must find
the pockets that remain.
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00:14:30,987 --> 00:14:31,986
[squeaking]
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River otters.
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00:14:35,074 --> 00:14:36,908
Four large pups,
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00:14:36,918 --> 00:14:38,751
Almost as big as their mother.
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00:14:40,914 --> 00:14:44,966
She'll guide them through their
first winter in yellowstone.
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00:14:50,506 --> 00:14:53,007
[squeaking]
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00:14:53,018 --> 00:14:57,937
What looks like simple play
is actually much more.
176
00:14:58,014 --> 00:15:00,348
It's social bonding,
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00:15:00,358 --> 00:15:02,767
Grooming,
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00:15:02,777 --> 00:15:04,944
Marking territory.
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00:15:05,021 --> 00:15:08,105
The pups must master
these routines
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00:15:08,116 --> 00:15:11,451
Before they can venture out
on their own.
181
00:15:11,527 --> 00:15:13,953
[squeaking]
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00:15:14,030 --> 00:15:15,204
But no skill
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00:15:15,281 --> 00:15:17,540
Will be more important
to the otters' survival
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00:15:17,617 --> 00:15:19,709
Than finding food.
185
00:15:24,040 --> 00:15:26,540
And now their territory
has been reduced
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00:15:26,551 --> 00:15:29,802
To these last fragments
of open river.
187
00:15:38,221 --> 00:15:41,731
Otters are built for fishing.
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00:15:41,808 --> 00:15:43,983
Dense hair traps air bubbles
189
00:15:44,060 --> 00:15:47,061
And keeps icy water
from warm skin.
190
00:15:47,072 --> 00:15:50,156
Ears and nostrils close
191
00:15:50,233 --> 00:15:53,242
To allow dives
several minutes long.
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00:15:55,205 --> 00:15:58,081
Rapid digestion
and quick metabolism
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00:15:58,157 --> 00:16:00,792
Demand constant fuel.
194
00:16:13,089 --> 00:16:16,349
Today, success is shared.
195
00:16:18,094 --> 00:16:20,103
The otters feast.
196
00:16:23,683 --> 00:16:26,600
The appetites
of such a large family
197
00:16:26,611 --> 00:16:29,654
Quickly exhaust
even a bountiful supply.
198
00:16:32,033 --> 00:16:36,327
Together, the otters have taken
all that this pool has to offer.
199
00:16:38,948 --> 00:16:40,948
They need a fresh cache.
200
00:16:43,795 --> 00:16:46,287
And in these trying conditions,
201
00:16:46,297 --> 00:16:49,799
The next fishing hole
could be a long way off.
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00:16:52,295 --> 00:16:54,053
Led by their mother,
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00:16:54,222 --> 00:16:56,806
The travelers set out
with determination.
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00:16:56,883 --> 00:16:58,716
[squeaking]
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00:16:58,727 --> 00:17:03,146
Otters are capable
of overland treks.
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00:17:03,222 --> 00:17:08,059
But leaving the water
means vulnerability,
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00:17:08,069 --> 00:17:10,236
Because on land,
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They become the hunted.
209
00:17:15,651 --> 00:17:19,078
They must traverse from
one fishing hole to another
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00:17:19,205 --> 00:17:20,955
While avoiding predators.
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00:17:27,172 --> 00:17:31,248
The otters run quickly...
212
00:17:31,259 --> 00:17:33,760
And slide with ease.
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00:17:33,836 --> 00:17:43,686
♪
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00:17:43,763 --> 00:17:48,441
♪
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00:17:48,518 --> 00:17:51,444
But before they reach
their destination,
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00:17:51,521 --> 00:17:53,613
Their journey is hindered.
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00:17:53,689 --> 00:18:03,623
♪
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00:18:03,699 --> 00:18:07,126
Snow flurries
make it difficult to see,
219
00:18:07,203 --> 00:18:08,702
Harder to follow.
220
00:18:08,713 --> 00:18:22,058
♪
221
00:18:22,135 --> 00:18:24,227
A pup falls behind.
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00:18:26,139 --> 00:18:28,648
Soon she's separated.
223
00:18:33,229 --> 00:18:35,238
And the storm is building.
224
00:18:41,663 --> 00:18:44,497
The blizzard could
settle in for days.
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00:18:46,292 --> 00:18:48,826
Disorienting.
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00:18:48,837 --> 00:18:50,253
Relentless.
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00:18:57,170 --> 00:18:59,011
Tracks disappear.
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00:19:04,102 --> 00:19:07,520
Drifts swallow distress calls.
229
00:19:17,523 --> 00:19:19,699
[squeak]
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00:19:19,775 --> 00:19:25,121
The otter pup isn't ready
to survive alone in yellowstone.
231
00:19:25,198 --> 00:19:26,614
[squeak]
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00:19:29,452 --> 00:19:32,545
But if she doesn't
find family soon,
233
00:19:32,622 --> 00:19:37,008
The whiteout could bury
any hope of a reunion.
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00:19:40,305 --> 00:19:49,303
♪
235
00:19:49,314 --> 00:19:51,898
A winter blizzard in yellowstone
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00:19:51,974 --> 00:19:54,984
Is a singular collision
of mighty forces.
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00:20:02,568 --> 00:20:12,084
♪
238
00:20:12,161 --> 00:20:16,047
Driving snow meets rising heat.
239
00:20:18,334 --> 00:20:19,592
Thermal imagery
240
00:20:19,669 --> 00:20:23,387
Reveals a remarkable contrast
in temperature.
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00:20:25,433 --> 00:20:28,267
Water heated
above the boiling point
242
00:20:28,344 --> 00:20:31,729
Meets air that's
far below freezing.
243
00:20:33,399 --> 00:20:35,432
Just beneath the surface
244
00:20:35,443 --> 00:20:39,937
Lies the world's largest
active supervolcano,
245
00:20:39,948 --> 00:20:44,450
Molten rock more than
a thousand degrees fahrenheit.
246
00:20:44,527 --> 00:20:48,704
Two massive magma chambers
247
00:20:48,781 --> 00:20:53,701
Emitting a subterranean
thermal glow.
248
00:20:53,711 --> 00:20:55,211
Fire...
249
00:20:55,288 --> 00:20:58,214
And ice.
250
00:20:58,291 --> 00:21:01,550
Yellowstone's extremes.
251
00:21:03,721 --> 00:21:08,641
Away from the direct impact
of the volcano's heat,
252
00:21:08,718 --> 00:21:12,636
Snowfall accumulates
in staggering depths.
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00:21:12,647 --> 00:21:21,979
♪
254
00:21:21,990 --> 00:21:25,992
Few species are prepared to
withstand these conditions.
255
00:21:32,158 --> 00:21:35,668
But two million winters
have shaped a creature
256
00:21:35,745 --> 00:21:39,797
Who attempts to survive here
long after others have fled.
257
00:21:43,836 --> 00:21:45,594
The bison.
258
00:21:47,423 --> 00:21:51,851
A muscular hump
supports a massive head--
259
00:21:51,927 --> 00:21:56,022
A snowplow
that clears away drifts
260
00:21:56,098 --> 00:21:58,274
And uncovers buried grasses.
261
00:22:03,531 --> 00:22:06,532
A dense coat and layers of fat
262
00:22:06,609 --> 00:22:09,702
Stave off
the punishing wind and cold.
263
00:22:09,779 --> 00:22:11,862
[grunt]
264
00:22:11,873 --> 00:22:15,374
These beasts
carry winter with them,
265
00:22:15,460 --> 00:22:17,168
Every step.
266
00:22:18,954 --> 00:22:23,215
They're the descendants
of survivors from a past world.
267
00:22:25,803 --> 00:22:28,054
The conquest of the continent
268
00:22:28,130 --> 00:22:31,474
Nearly spelled the extinction
of their species.
269
00:22:33,478 --> 00:22:35,394
In the 1800s,
270
00:22:35,605 --> 00:22:38,055
As america expanded westward,
271
00:22:38,066 --> 00:22:41,567
Herds that numbered
in the tens of millions
272
00:22:41,644 --> 00:22:44,153
Were slaughtered.
273
00:22:44,230 --> 00:22:46,405
By the late 19th century,
274
00:22:46,482 --> 00:22:50,409
Only a few hundred bison
remained.
275
00:22:50,620 --> 00:22:53,153
The last free-roaming herd
276
00:22:53,164 --> 00:22:58,075
Lay hidden in a remote valley
in yellowstone.
277
00:22:58,086 --> 00:23:12,431
♪
278
00:23:12,508 --> 00:23:15,017
These two dozen bison
279
00:23:15,094 --> 00:23:18,437
Became the source
for a recovery of the species.
280
00:23:22,518 --> 00:23:26,737
Yellowstone is now home
to thousands of bison.
281
00:23:28,691 --> 00:23:33,077
They wage an ancient battle
with the storm.
282
00:23:35,197 --> 00:23:36,447
But each winter
283
00:23:36,457 --> 00:23:38,874
There comes a time
when the snow gets too deep
284
00:23:38,951 --> 00:23:41,377
For these animals
to find forage.
285
00:23:42,705 --> 00:23:45,464
The bison begin to stir,
286
00:23:45,675 --> 00:23:47,842
To rearrange themselves.
287
00:23:51,139 --> 00:23:53,130
A matriarch,
288
00:23:53,141 --> 00:23:54,557
The leader of the herd,
289
00:23:54,633 --> 00:23:56,559
Gives a signal.
290
00:23:58,554 --> 00:24:01,021
It's time to move.
291
00:24:05,561 --> 00:24:09,071
Guided by instinct
and experience,
292
00:24:09,148 --> 00:24:12,575
The bison fall into line
to follow her trail.
293
00:24:16,071 --> 00:24:18,989
This is the beginning
of their migration.
294
00:24:19,000 --> 00:24:29,917
♪
295
00:24:29,927 --> 00:24:40,177
♪
296
00:24:40,188 --> 00:24:45,608
As darkness falls,
the herd leaves the valley,
297
00:24:45,684 --> 00:24:49,686
Marching towards the heart
of yellowstone's warmth
298
00:24:49,697 --> 00:24:52,323
And the possibility of relief.
299
00:25:07,715 --> 00:25:09,373
Through the blizzard,
300
00:25:09,383 --> 00:25:13,594
The bobcat has found shelter
in a cave in the cliffs.
301
00:25:17,466 --> 00:25:18,557
But at first light,
302
00:25:18,768 --> 00:25:21,894
His patience
gives way to his hunger.
303
00:25:21,971 --> 00:25:32,312
♪
304
00:25:32,323 --> 00:25:46,493
♪
305
00:25:46,504 --> 00:25:56,679
♪
306
00:25:59,725 --> 00:26:01,559
A familiar scene...
307
00:26:05,347 --> 00:26:07,273
And a promising start.
308
00:26:21,789 --> 00:26:23,455
[quack]
309
00:26:26,294 --> 00:26:29,295
The bobcat has the duck
in his sights.
310
00:26:31,966 --> 00:26:34,550
The stalker hasn't been spotted.
311
00:26:42,468 --> 00:26:44,602
The cat keeps a low profile...
312
00:26:48,399 --> 00:26:50,608
And prepares an ambush.
313
00:26:55,230 --> 00:26:57,156
But the duck passes
314
00:26:57,232 --> 00:26:58,782
Just out of range.
315
00:27:00,819 --> 00:27:04,413
Another opportunity drifts away.
316
00:27:09,587 --> 00:27:11,337
[rustling]
317
00:27:11,413 --> 00:27:15,007
Something much closer
rustles beneath the snow.
318
00:27:15,084 --> 00:27:24,933
♪
319
00:27:25,010 --> 00:27:29,188
Exactly what it is
the bobcat can't tell.
320
00:27:32,777 --> 00:27:35,852
But this hunt, on land,
321
00:27:35,863 --> 00:27:38,697
Is a familiar pursuit.
322
00:27:38,866 --> 00:27:41,450
Follow a sound...
323
00:27:41,527 --> 00:27:44,370
Orient...
324
00:27:44,446 --> 00:27:45,788
And pounce.
325
00:27:52,037 --> 00:27:55,339
Whatever is moving below
has dodged a strike.
326
00:27:59,220 --> 00:28:02,129
But its sound
still gives it away.
327
00:28:02,139 --> 00:28:04,556
[scratching]
328
00:28:04,633 --> 00:28:06,725
♪
329
00:28:06,811 --> 00:28:09,469
[scratching]
330
00:28:09,480 --> 00:28:16,735
♪
331
00:28:16,812 --> 00:28:19,146
[scratching]
332
00:28:19,156 --> 00:28:27,162
♪
333
00:28:27,239 --> 00:28:29,748
[squeaking]
334
00:28:29,917 --> 00:28:34,086
Finally,
a small taste of success.
335
00:28:37,916 --> 00:28:39,883
A rodent isn't much.
336
00:28:41,762 --> 00:28:43,754
But the bobcat
seems to take away
337
00:28:43,764 --> 00:28:47,266
More than a meager meal.
338
00:28:47,342 --> 00:28:49,593
It's as if the cat
has remembered
339
00:28:49,603 --> 00:28:52,771
His most powerful weapon--
340
00:28:52,848 --> 00:28:54,314
Agility.
341
00:29:02,941 --> 00:29:05,909
Having a target is one thing.
342
00:29:12,785 --> 00:29:14,701
[splash]
343
00:29:14,712 --> 00:29:18,422
Hitting it perfectly
is another.
344
00:29:20,209 --> 00:29:22,760
And the ducks
are a moving target.
345
00:29:25,556 --> 00:29:27,714
When they spot the bobcat,
346
00:29:27,725 --> 00:29:29,975
They find their safe zone--
347
00:29:30,052 --> 00:29:32,186
The middle of the river.
348
00:29:37,893 --> 00:29:41,478
But lose track of the cat,
349
00:29:41,489 --> 00:29:43,614
And the tables turn.
350
00:29:45,951 --> 00:29:47,901
[splash]
351
00:29:47,912 --> 00:29:50,403
The bobcat must get
into striking range
352
00:29:50,414 --> 00:29:52,414
Without being detected.
353
00:29:56,003 --> 00:30:00,172
And he's mastering his approach.
354
00:30:00,249 --> 00:30:10,098
♪
355
00:30:10,175 --> 00:30:19,015
♪
356
00:30:19,026 --> 00:30:22,519
Everything
is floating into place.
357
00:30:22,530 --> 00:30:30,861
♪
358
00:30:30,871 --> 00:30:35,624
[quacking]
359
00:30:35,701 --> 00:30:37,200
The perfect ambush,
360
00:30:37,211 --> 00:30:39,878
Foiled by an awkward takeoff.
361
00:30:39,955 --> 00:30:44,216
[quacking]
362
00:30:50,549 --> 00:30:53,892
With winter's hardest days
still to come,
363
00:30:54,061 --> 00:30:57,020
The bobcat faces
ever heightened stakes.
364
00:30:58,473 --> 00:31:01,900
He must master
this hunting ground
365
00:31:02,111 --> 00:31:03,902
Before it's too late.
366
00:31:07,491 --> 00:31:09,908
The blizzard has passed.
367
00:31:09,985 --> 00:31:11,952
But its consequences linger.
368
00:31:16,250 --> 00:31:19,918
The otter pup,
lost in the storm,
369
00:31:19,995 --> 00:31:23,088
Continues her search
for any sign of family.
370
00:31:26,135 --> 00:31:29,261
The clearing sky
means the pup can see again.
371
00:31:32,925 --> 00:31:35,183
But she can also be seen.
372
00:31:35,260 --> 00:31:40,689
♪
373
00:31:40,766 --> 00:31:42,941
A coyote.
374
00:31:43,018 --> 00:31:44,568
Always on the hunt.
375
00:31:45,946 --> 00:31:48,822
It homes in on the stranded pup.
376
00:31:50,192 --> 00:31:53,109
Out of the water and alone,
377
00:31:53,120 --> 00:31:55,037
She's defenseless.
378
00:31:56,365 --> 00:31:58,123
It's a race.
379
00:31:58,200 --> 00:32:00,959
The otter must reach
the safety of the water
380
00:32:01,045 --> 00:32:03,787
Before the coyote attacks.
381
00:32:03,797 --> 00:32:13,847
♪
382
00:32:13,849 --> 00:32:18,977
♪
383
00:32:19,063 --> 00:32:20,562
In the water,
384
00:32:20,639 --> 00:32:24,641
The pup is back on top
of the food chain.
385
00:32:24,652 --> 00:32:26,693
Pursuit would be futile.
386
00:32:29,573 --> 00:32:31,231
[splash]
387
00:32:31,241 --> 00:32:33,992
And with the sound of a splash,
388
00:32:34,078 --> 00:32:36,328
The pup doubles her luck.
389
00:32:36,405 --> 00:32:47,831
♪
390
00:32:47,841 --> 00:32:59,768
♪
391
00:32:59,845 --> 00:33:04,189
[squeaking]
392
00:33:04,266 --> 00:33:08,935
Time to celebrate
a family reunion.
393
00:33:08,946 --> 00:33:16,026
♪
394
00:33:16,036 --> 00:33:18,361
[squeaking]
395
00:33:18,372 --> 00:33:29,798
♪
396
00:33:29,875 --> 00:33:31,791
In the heart of yellowstone,
397
00:33:31,802 --> 00:33:35,137
Another journey
that began in the blizzard
398
00:33:35,213 --> 00:33:38,515
Is also ending with relief.
399
00:33:41,186 --> 00:33:45,230
The bison have traded
deep snow for this...
400
00:33:47,559 --> 00:33:50,727
A place where the heat
from yellowstone's core
401
00:33:50,738 --> 00:33:53,229
Rises from the ground
402
00:33:53,240 --> 00:33:56,241
And erases the weight of winter.
403
00:33:56,318 --> 00:34:10,088
♪
404
00:34:10,215 --> 00:34:12,174
While much
of yellowstone's grasslands
405
00:34:12,250 --> 00:34:14,509
Lie buried by storms,
406
00:34:14,586 --> 00:34:18,305
Here heat from the supervolcano
melts the snow.
407
00:34:23,845 --> 00:34:25,604
The bison have found refuge
408
00:34:25,680 --> 00:34:28,598
In the warmth
of the geyser basin.
409
00:34:28,609 --> 00:34:41,277
♪
410
00:34:41,288 --> 00:34:55,133
♪
411
00:34:55,210 --> 00:34:59,546
This is the fiery heart
of yellowstone.
412
00:34:59,556 --> 00:35:06,302
♪
413
00:35:06,313 --> 00:35:09,106
Its geothermal core.
414
00:35:12,736 --> 00:35:15,728
Yellowstone boasts
the largest collection
415
00:35:15,739 --> 00:35:18,406
Of geothermal wonders
in the world.
416
00:35:21,245 --> 00:35:25,539
A stunning array
of more than 10,000 features.
417
00:35:29,378 --> 00:35:31,253
Geysers spew water
418
00:35:31,329 --> 00:35:34,172
That has been super heated
under extreme pressure
419
00:35:34,383 --> 00:35:37,843
To temperatures
above the boiling point.
420
00:35:37,919 --> 00:35:42,755
Fumaroles hiss and whistle
as steam escapes.
421
00:35:42,766 --> 00:35:45,183
[hissing]
422
00:35:45,269 --> 00:35:48,270
[burbling]
423
00:35:48,346 --> 00:35:53,191
Mud pots bubble with a mixture
of surface water and clay
424
00:35:53,268 --> 00:35:57,612
And stink of sulfide gases
rising from the ground.
425
00:36:00,409 --> 00:36:05,120
Hot springs showcase
the color of rare bacteria
426
00:36:05,197 --> 00:36:07,497
That thrive in extreme heat.
427
00:36:12,421 --> 00:36:13,962
Terraces form
428
00:36:14,039 --> 00:36:18,458
As thermal waters deposit layers
of dissolved limestone
429
00:36:18,468 --> 00:36:20,719
In cascading tiers.
430
00:36:24,558 --> 00:36:26,808
These extraordinary sights
431
00:36:26,885 --> 00:36:31,054
Are what inspired
an unprecedented act--
432
00:36:31,064 --> 00:36:35,192
The creation of the world's
first national park.
433
00:36:40,148 --> 00:36:44,817
The boundaries of yellowstone,
set down in 1872,
434
00:36:44,828 --> 00:36:49,539
Were originally drawn to protect
its geothermal features.
435
00:36:51,668 --> 00:36:55,462
This is what
early visitors came to see.
436
00:36:59,501 --> 00:37:02,260
Yellowstone's
most famous attraction
437
00:37:02,471 --> 00:37:04,262
Is old faithful,
438
00:37:04,339 --> 00:37:08,266
A geyser named for
its predictable eruptions.
439
00:37:08,435 --> 00:37:11,269
The historic
old faithful village
440
00:37:11,346 --> 00:37:14,689
Was built to frame
the iconic landmark.
441
00:37:17,102 --> 00:37:23,281
Hamilton's store has stood here
for more than a century.
442
00:37:23,450 --> 00:37:27,694
But every winter, it's tested.
443
00:37:27,704 --> 00:37:30,956
The weight of snow
collecting on its roof
444
00:37:31,032 --> 00:37:34,951
Could collapse the building.
445
00:37:34,962 --> 00:37:38,588
Its preservation
depends on intervention.
446
00:37:41,376 --> 00:37:43,551
They're called
the winter keepers...
447
00:37:45,138 --> 00:37:49,557
The hardy souls who work to
guard relics of another time.
448
00:37:53,888 --> 00:37:55,647
Their challenge:
449
00:37:55,724 --> 00:38:00,485
Saving the hamilton store
from the burden of winter.
450
00:38:00,562 --> 00:38:10,245
♪
451
00:38:10,322 --> 00:38:20,338
♪
452
00:38:20,415 --> 00:38:24,426
Their technique,
practiced and precise,
453
00:38:24,502 --> 00:38:27,086
Allows them to remove
massive blocks
454
00:38:27,097 --> 00:38:29,097
With dramatic efficiency.
455
00:38:34,596 --> 00:38:38,356
A single slab can weigh
as much as a thousand pounds.
456
00:38:38,442 --> 00:38:49,859
♪
457
00:38:49,870 --> 00:39:00,462
♪
458
00:39:00,538 --> 00:39:04,040
When all of the lower roof
is clear,
459
00:39:04,051 --> 00:39:07,719
They attempt the final
and most dangerous procedure.
460
00:39:10,140 --> 00:39:12,599
Their tool is a simple rope.
461
00:39:14,478 --> 00:39:19,222
But the team
must position it perfectly.
462
00:39:19,232 --> 00:39:31,409
♪
463
00:39:31,495 --> 00:39:35,905
The rope becomes
a giant snow saw.
464
00:39:35,916 --> 00:39:46,174
[rubbing]
465
00:39:46,251 --> 00:39:48,343
And with one last tug...
466
00:39:51,014 --> 00:39:54,674
The weight of winter
comes crashing down.
467
00:39:54,684 --> 00:40:04,442
♪
468
00:40:04,519 --> 00:40:08,938
Hamilton's store is relieved
of the burden of the season.
469
00:40:08,949 --> 00:40:16,454
♪
470
00:40:16,531 --> 00:40:19,457
The bison have also found relief
471
00:40:19,584 --> 00:40:22,460
In this place where
they can still reach food.
472
00:40:22,537 --> 00:40:33,129
♪
473
00:40:33,140 --> 00:40:38,476
♪
474
00:40:38,645 --> 00:40:39,727
[snorting]
475
00:40:39,804 --> 00:40:42,555
Like a watering hole
on the serengeti,
476
00:40:42,566 --> 00:40:48,403
This oasis draws both refugees
and opportunists.
477
00:40:52,484 --> 00:40:55,651
Skulking in the curtains
of steam
478
00:40:55,662 --> 00:40:58,913
Is one of the season's
most deadly forces.
479
00:41:01,075 --> 00:41:04,627
The largest pack of wolves
in yellowstone...
480
00:41:06,923 --> 00:41:10,583
Drawn here by the growing
numbers of bison
481
00:41:10,594 --> 00:41:13,553
Seeking shelter in the heat.
482
00:41:17,258 --> 00:41:19,684
Unlike many species,
483
00:41:19,761 --> 00:41:23,521
The wolves find advantage
in the winter.
484
00:41:23,598 --> 00:41:27,525
Long legs
can ford the deep snow.
485
00:41:27,652 --> 00:41:28,693
Woolly coats
486
00:41:28,770 --> 00:41:30,770
With a protective layer
of guard hair
487
00:41:30,780 --> 00:41:34,106
Keep heat in and moisture out.
488
00:41:34,117 --> 00:41:36,451
[howling]
489
00:41:36,528 --> 00:41:38,578
The wolf is strong.
490
00:41:40,698 --> 00:41:43,791
And the bison is at its weakest.
491
00:41:43,868 --> 00:41:45,210
[snort]
492
00:41:45,286 --> 00:41:46,711
[growl]
493
00:41:46,788 --> 00:41:51,424
For months, it's expended
more energy than it can replace.
494
00:41:52,886 --> 00:41:54,886
The wolves have little chance
495
00:41:54,963 --> 00:41:57,680
Of taking down a bison
in its prime.
496
00:41:59,309 --> 00:42:01,976
But now things are different.
497
00:42:06,650 --> 00:42:09,400
As darkness falls,
498
00:42:09,477 --> 00:42:11,611
The pack closes in.
499
00:42:14,074 --> 00:42:15,731
[howling]
500
00:42:15,742 --> 00:42:18,576
Their howls betray success.
501
00:42:18,745 --> 00:42:23,706
[howling]
502
00:42:26,160 --> 00:42:28,411
By first light,
503
00:42:28,421 --> 00:42:31,631
The wolves have stripped
the bison to the bone...
504
00:42:34,010 --> 00:42:37,679
Each consuming more than
20 pounds of meat.
505
00:42:37,755 --> 00:42:39,597
[birds squawking]
506
00:42:39,724 --> 00:42:41,891
[growling]
507
00:42:46,773 --> 00:42:49,857
When the pack
has taken its fill,
508
00:42:49,934 --> 00:42:53,611
The carcass becomes
a food source for many.
509
00:42:53,697 --> 00:43:01,360
♪
510
00:43:01,371 --> 00:43:04,539
[squawking]
511
00:43:08,712 --> 00:43:11,796
A red fox is last to the scene.
512
00:43:11,873 --> 00:43:23,049
♪
513
00:43:23,059 --> 00:43:26,886
♪
514
00:43:26,896 --> 00:43:30,356
But there's nothing
it can glean from the bones.
515
00:43:33,728 --> 00:43:35,945
The fox must find more.
516
00:43:41,911 --> 00:43:44,820
Unlike its relative, the wolf,
517
00:43:44,831 --> 00:43:48,666
The fox moves through
yellowstone's winter alone,
518
00:43:48,877 --> 00:43:50,376
Without a pack.
519
00:43:52,422 --> 00:43:55,340
But even when there's
no one else in sight,
520
00:43:55,416 --> 00:43:57,342
It marks its territory,
521
00:43:57,418 --> 00:44:01,679
Rubbing scent glands
against the snow.
522
00:44:01,806 --> 00:44:04,507
The fox can sense life here
523
00:44:04,517 --> 00:44:06,768
And opportunity--
524
00:44:06,844 --> 00:44:10,104
Movements that can't be seen.
525
00:44:13,610 --> 00:44:15,693
With acute hearing,
526
00:44:15,770 --> 00:44:17,028
The fox traces the sound
527
00:44:17,105 --> 00:44:20,657
Of rodents tunneling
deep beneath the surface.
528
00:44:23,277 --> 00:44:25,703
The fox listens...
529
00:44:25,789 --> 00:44:28,706
Calculates...
530
00:44:28,917 --> 00:44:30,541
And commits.
531
00:44:48,853 --> 00:44:50,720
No luck.
532
00:44:50,730 --> 00:44:53,147
And maybe even a headache.
533
00:44:58,947 --> 00:45:01,989
This landscape
might look uniform,
534
00:45:02,066 --> 00:45:05,484
An endless field of white.
535
00:45:05,495 --> 00:45:07,161
But since the last storm,
536
00:45:07,238 --> 00:45:12,250
The wind has shifted the terrain
and loaded dangerous drifts.
537
00:45:14,245 --> 00:45:17,588
Any step could be
a lethal trigger.
538
00:45:17,665 --> 00:45:27,765
♪
539
00:45:27,842 --> 00:45:29,642
A narrow escape.
540
00:45:31,429 --> 00:45:35,106
The lucky fox
can continue his quest.
541
00:45:37,861 --> 00:45:39,444
Beneath the snowpack
542
00:45:39,520 --> 00:45:42,864
Lies an invisible world
bustling with activity.
543
00:45:45,368 --> 00:45:48,286
Hundreds of small rodents
called voles
544
00:45:48,362 --> 00:45:50,538
Scurry through
a network of tunnels,
545
00:45:50,615 --> 00:45:52,290
Nestled in the airy layer
546
00:45:52,366 --> 00:45:55,209
Between solid earth
and the snow above.
547
00:45:55,286 --> 00:46:02,792
♪
548
00:46:02,802 --> 00:46:05,211
The fox scores his prize.
549
00:46:05,221 --> 00:46:11,893
♪
550
00:46:11,969 --> 00:46:14,812
Voles are one of the most
important prey species
551
00:46:14,889 --> 00:46:16,722
In yellowstone,
552
00:46:16,733 --> 00:46:19,984
For creatures large and small.
553
00:46:23,898 --> 00:46:26,315
The ermine is swift,
554
00:46:26,326 --> 00:46:29,827
Perfectly camouflaged
by its snow white winter coat.
555
00:46:29,904 --> 00:46:36,575
♪
556
00:46:36,586 --> 00:46:38,577
The coyote,
557
00:46:38,588 --> 00:46:41,923
Not as graceful in its approach,
558
00:46:41,999 --> 00:46:43,833
But just as effective.
559
00:46:43,843 --> 00:46:49,922
♪
560
00:46:49,933 --> 00:46:53,509
An abundance of voles
may give each of these hunters
561
00:46:53,520 --> 00:46:57,021
A chance of surviving
this relentless season...
562
00:46:59,859 --> 00:47:05,104
For winter's most lethal force
may well be its duration.
563
00:47:05,114 --> 00:47:16,115
♪
564
00:47:16,125 --> 00:47:22,204
♪
565
00:47:22,215 --> 00:47:24,882
Winter conditions
prevail in yellowstone
566
00:47:25,093 --> 00:47:27,209
For more than half the year.
567
00:47:30,047 --> 00:47:33,549
Endless exposure
and slow starvation
568
00:47:33,560 --> 00:47:36,811
Have taken a toll
on this great beast.
569
00:47:40,391 --> 00:47:44,735
Nearly one in ten bison
will not survive the winter.
570
00:47:44,812 --> 00:47:52,410
♪
571
00:47:52,486 --> 00:47:55,487
Predators cannot be blamed
for this death.
572
00:47:55,498 --> 00:47:59,917
♪
573
00:47:59,994 --> 00:48:03,921
It has a simple name--
574
00:48:03,998 --> 00:48:05,965
Winter kill.
575
00:48:08,094 --> 00:48:10,011
At the bison's carcass,
576
00:48:10,087 --> 00:48:13,180
Hunters become scavengers.
577
00:48:13,257 --> 00:48:24,817
♪
578
00:48:28,105 --> 00:48:32,199
But the bobcat has not given up
his pursuit on the river.
579
00:48:37,457 --> 00:48:40,449
While the cat has gotten by
with small meals--
580
00:48:40,460 --> 00:48:43,369
The rodents he's caught
on the riverbank--
581
00:48:43,379 --> 00:48:46,964
He still has his sights
on something richer.
582
00:48:49,135 --> 00:48:51,010
Sitting ducks.
583
00:48:52,639 --> 00:48:56,382
It's time to put everything
he's learned into action.
584
00:48:56,392 --> 00:49:05,983
♪
585
00:49:06,069 --> 00:49:07,985
He knows his strategy.
586
00:49:08,071 --> 00:49:16,068
♪
587
00:49:16,079 --> 00:49:19,997
While the ducks
remain oblivious,
588
00:49:20,124 --> 00:49:23,409
He maneuvers into position.
589
00:49:23,419 --> 00:49:35,921
♪
590
00:49:35,932 --> 00:49:46,607
♪
591
00:49:49,946 --> 00:49:54,782
♪
592
00:50:07,046 --> 00:50:08,537
The perfect strike.
593
00:50:08,548 --> 00:50:09,380
[quack]
594
00:50:21,644 --> 00:50:27,148
♪
595
00:50:27,224 --> 00:50:33,145
At last, the bobcat
has mastered the river,
596
00:50:33,156 --> 00:50:35,072
And with it...
597
00:50:35,149 --> 00:50:36,657
Winter.
598
00:50:42,081 --> 00:50:44,823
He has defied the ice,
599
00:50:44,834 --> 00:50:46,917
The depths of snow.
600
00:50:46,994 --> 00:50:58,929
♪
601
00:50:59,006 --> 00:51:00,347
For all who have survived
602
00:51:00,424 --> 00:51:03,675
The trials of this season
in yellowstone,
603
00:51:03,686 --> 00:51:06,270
There will soon
be signs of change.
604
00:51:09,233 --> 00:51:12,109
Winter will retreat.
605
00:51:12,186 --> 00:51:14,945
Spring will come...
606
00:51:16,941 --> 00:51:18,824
Bringing first steps...
607
00:51:22,205 --> 00:51:24,530
New beginnings...
608
00:51:27,368 --> 00:51:29,535
And independence.
609
00:51:29,545 --> 00:51:40,137
♪
610
00:51:40,214 --> 00:51:44,266
♪
611
00:51:45,636 --> 00:51:48,979
That wet bobcat pulling
the duck out of the water,
612
00:51:49,056 --> 00:51:50,147
It's a rare sight.
613
00:51:50,233 --> 00:51:52,474
And the wolves
appearing from the steam.
614
00:51:52,485 --> 00:51:55,152
We're now able
to see life in yellowstone
615
00:51:55,238 --> 00:51:57,822
As we've never seen it before.
616
00:51:57,898 --> 00:51:59,815
Not long ago,
that scene with the wolves,
617
00:51:59,826 --> 00:52:02,827
That couldn't have
been filmed in the park.
618
00:52:02,903 --> 00:52:04,245
There weren't any.
619
00:52:04,321 --> 00:52:06,247
The next "epic yellowstone"
620
00:52:06,323 --> 00:52:09,408
Tells the story of the return
of the top predators.
621
00:52:09,418 --> 00:52:12,169
They're transforming
the national park,
622
00:52:12,296 --> 00:52:14,672
Restoring an ancient balance.
42889
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