:06:03
for some reason
:06:04
the dolphins always rush up
the banks on their right side
:06:08
over time
the teeth on that side will
:06:11
actually be worn down from
chewing as much mud as fish
:06:18
occasionally
they will work themselves
:06:21
completely out of the water
:06:26
being stranded up
here could be fatal
:06:41
as they shimmy up the mud
banks it's almost as
:06:44
if they're evolving into
the land creatures they once were
:06:51
some fifty million years ago
:06:53
the ancestors
of these air-breathing
:06:55
mammals ventured
into the seas
:07:02
to follow dolphins
in the wild is to discover
:07:04
one of the most remarkable
adaptations in the natural world
:07:10
they use their intelligence
to survive
:07:12
changing or inventing strategies
to suit their environment
:07:21
spinner dolphins leap in what
appears to a display of exuberance
:07:25
in fact,
:07:26
they may be signaling
others to join them,
:07:29
or coordinating
movements of the pod...
:07:32
a kind of long
distance communication.
:07:50
At close range,
:07:51
dolphins "speak" through
clicks and whistles.