There's a lot of behind-the-scenes information here that explores the series' origins, as well as why the iconic races look the way they do. The Krogan, for example, were created by combining attributes of bugs and bats, while Salarian scientist Mordin's grizzled look was inspired by Clint Eastwood. Oh, and then there's that shifty space cow out to steal your money.
Yes, that is a real thing in the original Mass Effect. Want to see it in action and learn some more interesting facts? Check out the video after the break.