In the oceans of Earth some 539 million years ago (Cambrian period), new kinds of animals called arthropods started to appear. These animals, such as this sea scorpion Eurypterus, have a hard, segmented exoskeleton and jointed limbs in pairs. Today, arthropods are extremely diverse, including insects, arachnids, crabs and lobsters. | |
Licence : | Libre de droits |
Crédit: | Science Photo Library / Garlick, Mark |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |