Reptiles on the web
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BBC Nature - Reptiles videos, news and facts
The reptiles are a class of vertebrates. Charateristically they are cold-blooded, have dry scaly or horny skin and a four-chambered heart.
www.bbc.co.uk › › Animals › Life › Animals › Vertebrates -
Mammal-like reptiles | Natural History Museum
View images of the reptiles that were the ancestors of mammals and that were the dominant land animals 260 million years ago.
www.nhm.ac.uk › › Non-dinosaur reptiles