Paleontologists finally have their first good look at a dinosaur butthole - CNET

For the first time ever, scientists take a closer look at the dinosaur's cloaca that was used to expel waste and, potentially, attract a mate.

Here's a digital reconstruction of a Psittacosaurus dinosaur illustrating how the cloacal vent may have been used for signaling during courtship.

Now a team of scientists from the University of Bristol has finally described in detail a dinosaur's cloacal or vent, which is used for everything from defecation and urination to attracting a mate to breed with (or, less scientifically, a jack-of-all-trades butthole).

A closer look at the preserved cloacal vent in Psittacosaurus.