Usually when we feature animals on this blog, it's because we've found photos or a video of some sort of ball-shrivelling freak of nature, but today we go in the other direction with this video of David Attenborough applying his Planet Earth narration voice to a video of a tortoise just humping the s--t out of a shoe.

Everyone I've talked to about Discovery's "Life" has two overriding about it: (1) "Wow, the footage is amazing.