Dinosaurs matured sexually while still growing

From Austin, Texas, at a meeting of the Society of Vertebrate Paleontology

A distinct type of bone tissue preserved in the fossils of several species of dinosaurs suggests that the ancient reptiles were sexually mature long before they’d gained adult size.

In modern-day female birds, a thin layer of bone that’s particularly rich in blood vessels—known as medullary bone—serves as a reservoir of calcium for eggshell production.