Fossil frog. Fossilised skeleton of a frog embedded in rock. Frogs and toads first appeared 190-160 million years ago in the early Jurassic Period. Their body shape has changed little since then,and most of the current frog families are geologically ancient. This lack of change makes modern frogs "living fossils" | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Steger, Volker |
Taille de l’image : | 3588 px × 4702 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |