This, Professor Benton says, was the window of opportunity dinosaurs needed to flourish. Professor Benton says the new vegetation that sprung up in the tropical climate would have been unsuitable for herbivorous reptiles, including dinosaurs, especially those at the top of the food chain.īut after the humid period - which lasted about one million years and created coniferous forests - passed it led to a period of arid conditions. However, when the slate was wiped clean by the mass extinction new ecosystems formed which, researchers say, resembled modern day networks and were dominated by dinosaurs. This, Professor Benton says, was the window of opportunity dinosaurs needed to flourish After the humid period - which lasted about one million years and created coniferous forests - passed it led to a period of dry, arid conditions.
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