National Geographic compiled a list of the ten weirdest nature stories of 2012. Check out their Weird & Wild files to see them all, but here's my favorite: The maned lioness. Yes, this is a female lion. These extremely rare specimens probably received an overabundance of androgens in the womb. You can read the story here.
A maned lioness in Botswana's Okavango Delta. Photograph courtesy Deon De Villiers.