This cloaca is more than 100 million years old, and it did a lot of work for this extinct species. By Katherine J. Wu The world’s oldest known all-purpose orifice sits in a fossil display case ...

The cloaca is an all-purpose opening on the body of many animals – including lizards, turtles and birds – that is used … Close. Advertisement. Skip to content. Sign in.

This particular cloaca was found on a Psittacosaurus specimen, a Cretaceous dinosaur that looked like a cross between a parrot and a lizard (not coincidentally, that’s also what ...