The evolution of feathers is associated with novel skin ultrastructures, but the fossil record of these changes is poor and thus the critical transition...
The unusual fossil from around 125 million years ago shows a dramatic moment in time when a species of badger-like carnivorous mammal called Repenomamus...
In egg-laying amniotes (reptiles, birds and monotremes), the developing embryo is tethered to a number of the extraembryonic membranes that deliver oxygen...
Although paleontologists know now much about dinosaurs and their appearance, they have not known anything about how their cloacal region — the all-purpose...
A University of Bristol-led international team of paleontologists has produced an accurate reconstruction of an exceptionally well-preserved specimen of...
