Males and females have a single opening—called the cloaca—that is a dual-use organ for sex and excretion. Evidence that Velociraptor had feathers. To find out more, including how to control cookies, see here: Teen pregnancies Lee and Werning estimated the ages of the three dinosaurs at the time of their death by looking at the rings in their bones. It looked like a modern-day woodpecker, the analysis showed:
Proceedings of the National Academy of Sciences, 2
Everything You Wanted to Know About Dinosaur Sex
If dinosaurs did the same, it might explain why this telltale tissue has gone unnoticed for so long. In this case, they showed that all three were mere adolescents — the Tenontosaurus was just 8 years old, the Allosaurus was 10 and the Tyrannosaurus was the eldest at Dinosaurs grew fast—another study by Lee and a different set of colleagues found that prey species such as the hadrosaur Hypacrosaurus may have grown faster than predatory species as a kind of defense. Beyond the likely basic anatomy, things get a bit tricky. For decades, conventional wisdom held that we would never know what color dinosaurs were.