A Hummingbird-Sized Dinosaur Skull Found Preserved in 99-Million-Year-Old Amber

Protected in a small piece of amber dating back 99 million years, an ancient skull is changing the timeline researchers have for when reptiles transitioned into the descendants of current-day birds. Found in Myanmar, the oculudentavis khaungraae had at least 23 sharp teeth on its upper jaw, which suggests that the dinosaur ate insects, according to an article published in Nature this week. Its eye was canonical with small pupils and resembles those of a modern lizard, while the edge of the socket indicates that it was well-equipped to see in bright light. About the size of a hummingbird’s, the skull totals .6 inches, although this avian species is thought to be 70 million years older. After archaeopteryx, it’s the most ancient bird and the tiniest dinosaur ever discovered. To prevent damage to the bone, researchers used X-rays to construct a 3D model that’s shown below. (via The History Blog)