You may remember the story of how photographer Paul Nicklen came face to face with a leopard seal, one of the Antarctic's top predators. Obviously, since he is the one who told us the story, you know he survived the encounter, but what you may not know is why he was there in the first place.
In the following TEDTalk presentation, Nicklen tells us of his childhood dream of getting people to become more acquainted with the wonders hidden beneath the ice. More importantly, and through the use of incredible photographs, he makes a passionate plea for conservation as he explains the importance that the polar caps have with respect to the food cycle: that's where it all starts.
For more on conservation, check out the environment tag.