Scientists have suggested that egg-laying may have been a factor in the extinction of the dinosaurs.
Scientists including University of Zurich's Marcus Clauss believe that a key factor was the limitation egg-laying imposed on the size of the infants upon birth, the young dinosaurs were forced to compete with adults of smaller species for food as they grew up. "That was not a problem for 150 million years but as soon as something happens that takes away all the large species so that only small species remain, if there are no small species to remain you are gone as a whole group," said Clauss.
"Given physical limitations to egg size, dinosaurs had comparatively small young."
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