Once hunted to the brink of extinction,
humpback whales have been designated
as an endangered species for the last
several decades.
However, these magnificent creatures
have made a remarkable comeback.
So much so, that there is a movement
underway to remove them from
the endangered species list, 
but are they ready?
The polar bear has become the poster
child for global warming.
Their habitat has been growing smaller
as the ice caps recede.
In the very deepest depths of the ocean
where the pressure is so great,
no life should exist.
Creatures like the fang-tooth fish and
the dragon fish
thrive thousands of feet beneath the
surface.
In the rainforests of central and south
america,
bright colors usually mean beware and
the blue poison dart frog, no exception.
Some species carry enough poison to kill
ten men.
The male lion may be the king of his
pride,
protecting and defending it against all
dangers.
But it is the female who not only cares
for the young,
but does the hunting, often in
well-coordinated groups.
Echo was a matriarchal elephant who was
studied for more than 30 years.
She died at age of 65 of old age,
but not before giving us
an understanding of how
elephants care for their young,
their emotions and their social order.
