How dinosaur arms turned into bird wings

29 September 2014
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You can forget Jurassic Park because actually dinosaurs are all around us! And I'm not joking because the fact is that when you see a chirping bird, you're actually looking at a modern dinosaur. Evidence has been growing for some time that our feathered friends are descended from small carnivorous dinosaurs called therapods. For example, the arrangement of bones in a bird's fingers, encased in the wing, is very similar to the bones in fossilised therapods. But there are still some biologists who study early development, as a chick grows in an egg, who aren't convinced by the dinosaur story. Now a new paper from scientists in Chile provides more evidence in favour of dinosaurs - and it all seems to hinge on their wrists. Kat Arney spoke to Paul Upchurch, from UCL's Earth Sciences department, to find out more.


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