Hm... lets see, I should have some interesting facts in my brain somewhere, I have been reading cracked articles a lot lately, and I also am able to retain interesting animal facts.
-All marsupials have forked penises/vaginas, this causes them to only be able to mate with other marsupials. This is why marsupials have stayed pretty much the same for so long, they are unable to mate with anyone but themselves.
-Hippos kill more people per year than all other African animals combined(maybe not ALL but close)
-Shakespeare invented many modern words such as assassin, alligator, and many others.
-Cows always feed facing north.
-Dolphins are the only other mammal besides humans that kill and have sex for sport. They will sometimes give blowjobs with their blowholes.
-Tigers have striped skin, the fur just follows suit.
I'm sure I have more...