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This fossil reveals how dinosaurs peed, pooped and had sex - CNN

This fossil reveals how dinosaurs peed, pooped and had sex - CNN

This fossil reveals how dinosaurs peed, pooped and had sex - CNN
Jan 19, 2021 47 secs

"We don't have any dinosaur fossils where you can be confident they've been caught in the act," said Jakob Vinther, a paleontologist and senior lecturer at the University of Bristol's School of Earth Sciences.

What we know is "based on natural history where we compare it to living groups of animals."

While most mammals have separate holes for bodily functions, many other animals -- including birds and reptiles -- have just one and it's known as the cloaca.

Vinther had worked on the fossil before in 2016, reconstructing the dinosaur's color patterns, and it was only at the end of that study that he realized that the cloaca was really well preserved, he said.

In animals with cloacal vents, the genitals are tucked inside the body and haven't been preserved so it's not known whether this particular dinosaur was male or female.

Most birds, the only living relative of dinosaurs, mate by "cloacal kissing" -- by pressing together their openings.

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