Prehistoric animals

There is an enormous variety of life on Earth, currently around 10 million species. But as many as there are now, 99 per cent of all species that have ever lived on Earth are now extinct - that makes a total of over five billion species in the history of the Earth. Of this 99 per cent, we mostly learn about them through palaeontology by studying fossils. Far from just dinosaurs, prehistoric animals are also made up of the reptiles, sea life and eventually mammals that came before and after.

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