Dinosaurs were thriving before the asteroid hit, new analysis suggests
New dating of a New Mexico fossil site counters idea that dinos were already on the decline
Alamosaurus sanjuanensis (illustrated) was a sauropod found among some of the last dinosaurs in what is today New Mexico. The rock formation that houses its fossils has been re-dated to the late Cretaceous Period, just a few hundred thousand years before asteroid impact.
Natalia Jagielska