The natural world is full of mysteries, controversies, hidden secretsand many, many wonderful animals.

Are wolves a threat to people or just a few bank balances? Are hyenas really cleverer than chimps? Should scientists be trying to clone passenger pigeons? And can anything or anybody stop poachers from killing our elephants and rhinos?

Credits: E&T Magazine, Sierra Club magazine, Reader's Digest, Earth Touch News, Wired, The Connexion France, IEEE Spectrum, Create, Wild Travel