Focus-Science and Technology - - Environment -

66 mil­lion years ago

This is prob­a­bly the most fa­mous mass ex­tinc­tion – it’s the as­ter­oid im­pact that killed

off the di­nosaurs and about 75 per cent of species. Since then, birds and mam­mals have evolved to be­come the dom­i­nant land species.

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