Dinosaurs lived in herds 40 million years earlier than we thought

We thought large plant-eating dinosaurs began to herd about 150 million years ago, but now we know the behaviour goes back at least 193 million years

Dinosaurs lived in herds 40 million years earlier than we thought
We thought large plant-eating dinosaurs began to herd about 150 million years ago, but now we know the behaviour goes back at least 193 million years