New type of dinosaur egg found in China
Researchers have found a new type of dinosaur egg from the Lower Cretaceous, or Early Cretaceous, in northwest China. The strata encompasses fossils dated between 100 million and 145 million years old. Dinosaur eggs from the Lower Cretaceous are hard to find. Eggs from the Upper Cretaceous -- a bit younger at 66 million to 100 million years old, and typically closer to the surface -- are much more common.