Question: do you know which came first the chicken or the egg

Maria McNamara answered on 19 Nov 2019:

Technically speaking eggs evolved before birds. Reptiles evolved egg-laying habits hundreds of millions of years before birds evolved. We don’t have evidence of fossil eggs for early reptiles but we do have evidence of some really nice dinosaur nests, usually with up to 20 eggs per nest, arranged in a distinct circle. Some species of dinosaur – hadrosaurs – laid their nests in huge breeding colonies, with hundreds of nests beside each other. Sometimes the baby dinosaur skeletons are still preserved inside the eggs, and sometimes the eggs have all hatched but all the babies’ skeletons can be preserved in the nest, indicating some form of brood care – i.e. some dinosaurs cared for their young.