Fossilised dinosaur footprint in sandstone. This is the print of a theropod dinosaur,a bipedal type of dinosaur that includes Velociraptor and Tyrannosaurus. This sandstone was laid down during the Cretaceous period,which lasted from 146 to 65 million years ago. The end of this period was marked by the mass extinction of the dinosaurs,but most palaeontologists consider the theropods to be the ancestors of modern birds. As well as a three-toed foot,theropods also had a wishbone,air-filled bones and in some cases,feathers. Photographed at Olhos de Agua,Portugal | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Stammers, Sinclair |
Taille de l’image : | 5120 px × 3431 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |