:21:09
Each species
finds a way to survive.
:21:12
Humpbacks have learned to invent
:21:14
and, more importantly,
to cooperate.
:21:40
In summer,
a miracle arrives from the sea
:21:46
in wave after wave
:21:47
salmon return
from the open ocean
:21:50
and embark
on a final migration inland
:21:53
to spawn in the same streams
of their birth.
:22:00
Silver bodies transfiguring
for the act of spawning...
:22:04
a phenomenal sense of smell
guiding them...
:22:07
they sweep into Alaska
by the millions
:22:10
in a vast flood of life.
:22:20
They face a marathon
journey upstream
:22:22
sometimes hundreds
of miles long
:22:27
yet they persist
:22:29
even in the face
of impossible obstacles.
:22:55
For brown bears,
the arrival of salmon
:22:58
is the most important
feeding event of the year.