Dinosaurs had sex. Fossil nests and eggs, as well as the ways today’s birds and crocodiles reproduce, leave no doubt on that ...

"Until we dig up a pair of preserved dinosaurs that were committed to the fossil record mid-mating, we have to get a bit ...

MacLennan et al. (1) report new radiometric dates and sedimentological context for the exceptionally preserved dinosaurs in the lower Yixian Formation. However, the sedimentology and provenance ...

We welcome Emery-Wetherell’s (1) comments on our study of the Early Cretaceous Yixian Formation in northeast China (2). Detailed attention to taphonomy of this assemblage, especially the ...