:31:02
Finally, the sea freezes over.
:31:05
The season of waiting
and fasting ends.
:31:10
With their extraordinary
sense of smell
:31:12
they can detect a seal
20 miles away.
:31:22
The feast of winter
is about to begin.
:31:34
Elsewhere in Alaska
:31:35
a time of darkness
and scarcity arrives.
:31:41
Caribou migrating
to wintering grounds
:31:44
scrape beneath the snow
day or night
:31:46
for moss and sedge grass.
:31:50
Searching for food
:31:51
they're vulnerable
to hungry predators.
:32:00
For a family of wolves
:32:02
prey are easier to track
in snow.
:32:23
With jaws powerful enough
:32:25
to crush
the caribou's largest bones
:32:28
they will leave little behind.
:32:53
For a species
that must cooperate
:32:54
to survive, rivalries are brief
:32:57
the leader's dominance
nearly absolute.