Paleontologists have collected and examined over 1,000 dinosaur eggshell samples from a fossil-rich site in the Shanyang Basin of central China — one of the most abundant dinosaur records from the Late Cretaceous epoch. The researchers have found only three eggshell types representing two dinosaur groups — oviraptors and hadrosaurs — in sediments deposited between 68 and 66 million years ago, indicating sustained low dinosaur biodiversity....
