How birds evolved from dinosaurs is a dinosaur paleontology question that extends all the way back to the late 1800s. After Charles Darwin published his “Origin of Species” in 1859, one of his friends ...

For more than two centuries, scientists have argued over where dinosaurs came from and how a scattered set of bones turned into a global dynasty. After decades of fieldwork and lab work, a clearer ...

When the big asteroid hit Mexico 66 million years ago, it set off wildfires, tsunamis and massive clouds of dust that darkened the skies, killed much of Earth’s plant life and triggered a chain of ...

Dinosaurs evolved from a group of reptiles called archosaurs (“ruling reptiles”) around 240–250 million years ago. This was during the Triassic period. This branch of the tree of life gave rise to ...