BBC Earth's latest natural history series, Human Planet, will do for us bewildering humans what Planet Earth and Life did for wildlife, demystifying our species by showing how we adapt to extreme conditions. Over the course of the series, Human Planet takes us from the glaciers of Greenland to the sand dunes of the Sahara and everywhere in between, zeroing in on the inhabitants of the world's most inhospitable locales. The one constant between these diverse peoples? The tireless and very human survival instinct.