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Asked by fishernwh to David, Helen, Ian, rhysphillips, Sarah on 24 Jun 2011.
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David Corne answered on 17 Jun 2011:
The really big guys died out completely — just not enough food left to sustain them — but many smaller species survived, and everything we have now comes from them.
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Rhys Phillips answered on 17 Jun 2011:
The ones which evolved into species we know today did so before becoming extinct.
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Ian van der Linde answered on 22 Jun 2011:
Large dinosaurs became extinct, but some of the smaller ones survived and had the opportunity to evolve into the species we see today. Godzilla slipped through the net.
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Helen Fletcher answered on 24 Jun 2011:
Quite simply- they didn’t become extinct! Birds are part of what is called an “order” of lifeforms called “Aves” (Latin for birds) but this is only a subcategory of the superorder “Dinosaura”, so people who study T-rex and the like are careful to call their subjects Non-Avian Dinosaurs, as birds are dinosaurs too! Dinosaurs can be roughly divided into Theropods- two legged dinosaurs like t-rex and velociraptor- and sauropods- massive long necked dinosaurs like diplodocus and apatosaurus. The sauropods are all extinct today, but birds are still classified as theropods. Therefore, your question is based on the assumption that all dinosaurs went extinct, when actually you have dinosaurs living in your garden right now!
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