|MadSci Network: Evolution|
I was wondering if it is possible that the reason dinosaurs grew so large may have been because they had some sort of genetic problem that kept them from being able to stop growing in size? And do scientists have any idea as to how fast they grew? It seems that even the biggest animals on earth (such as whales) take a very long time to reach their size, which is dwarfed by the size of certain dinosaurs, such as the brachiosaurus or diplodicus. This would suggest that an individual animal could live as long as 200 or 300 years before dying of old age. It seems like animals that live this long and grow unbounded would be genetically inferior from a species of animals that had a relatively shorter life and did not grow unbounded. I once read that when the extinction of the dinosaurs occured, nothing over 50 kilograms survived. Is it possible that the reason that mammals and smaller organisms survived the meteor impact was because of shorter life spans and ability to not grow unbounded because the dinosaurs would not have been able to find enough food to sustain themselves after the meteor impact blocked out the sun, but the smaller animals didn't need as much?
Re: Is it possible that Dinosaurs were large because of genetic defects?