![](http://l.yimg.com/a/i/ww/news/2010/11/25/dino.jpg)
Without dinosaurs, some mammals evolved larger than several elephants put together.
Also: The Quetzalcoatlus Pterosaur Could Probably Fly for 7-10 Days at a Time
![quetzalcoatlus_15597_1](http://uploads.neatorama.com/wp-content/uploads/2010/11/quetzalcoatlus_15597_1-150x101.jpg)
So Habib teamed up with Mark Witton, a British paleontologist, to plug in factors like wingspan, weight and aerodynamics into a computer model.
The results, which they presented at a conference last month, were staggering: They revealed an animal that could fly up to 80 miles an hour for 7 to 10 days at altitudes of 15,000 feet. The maximum range, Habib says, was probably between 8,000 and 12,000 miles.
![http://news.discovery.com/dinosaurs/2010/11/24/pterosaur-zoom.jpg](http://news.discovery.com/dinosaurs/2010/11/24/pterosaur-zoom.jpg)
A new species of crocodile that lived 100 million years ago has been identified from a fossil found in Thailand, researchers said Thursday.
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