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Asked by 10ssmith to Anna, Jonathan, Samantha, Sam on 4 Jul 2012.
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Jonathan Kay answered on 4 Jul 2012:
There were probably egg-laying animals before there were any dinosaurs. I’m not sure if we have any fossil eggs from them.
Did you know that all living birds are kinds of dinosaurs?
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Samantha Weaver answered on 4 Jul 2012:
I don’t know – it could be either. Like Jonathan says, an animal (bird of some sort) probably laid an egg and a dinosaur came out of it! However, in relation to chickens and eggs, I got some chickens last week and in my garden the chicken most definitely came before the eggs! Today was the first day we got an egg from all 3 chickens 🙂
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Sam Chilka answered on 4 Jul 2012:
I don’t know the answer to this, but as Jonathan says, dinosaurs probably evolved from other, smaller, egg-laying animals.
Comments
fleurarcher6192 commented on :
where do you work as a doctor @jonathon
Jonathan commented on :
At the John Radcliffe Hospital in Oxford. In the Department of Clinical Biochemistry.
Jonathan commented on :
I think this is the first time I’ve disagreed with a fellow Scientist! The sequence has to be: Other animal… Dinosaur that isn’t a bird…Bird. Sometimes you can see impressions of feathers in fossils, and we’re gradually working out the evolution of birds. Some people think the feathers evolved to keep the animals warm, and that flight came later.
Did you know that a few species of mammals lay eggs?