100 years ago, there were one and a half billion people on Earth. 100
Now, over 6 billion crowd our fragile planet.
But even so, there are still places barely touched by humanity.
This series will take you to the last wildernesses and show you the planet and its wildlife as you have never seen them before.
Imagine our world without sun.
Male emperor penguins are facing the nearest that exists on planet Earth, winter in Antarctica.
It's continuously dark and temperatures drop to minus 70 degrees centigrade.
The penguins stay when all other creatures have fled because each guards a treasure.
A single egg rested on the top of its feet and kept warm beneath the downy bulge of its stomach. ——
There is no food and no water for them, and they will not see the sun again for four months.
Surely no greater ordeal is faced by any animal. As the sun departs from the Antarctic it lightens the skies in the far north.