Posted on 11/11/2009 12:32:37 PM PST by decimon
Many dinosaurs may have been warm-blooded just like mammals or birds, potentially explaining their extraordinary success before their extinction.
For decades, scientists assumed that because dinosaurs resembled lizards, they were cold-blooded as well, their internal temperature rising and falling with the outside world. However, birds are warm-blooded, and the fact that birds seem to be descended from dinosaurs raises the question of whether their ancestors were as well.
If dinosaurs were warm-blooded, they would have possessed the potential for athletic abilities rivaling those of mammals and birds. They could have survived in colder habitats that would kill cold-blooded creatures, such as high mountain ranges and polar regions, enabling them to cover the entire landscape. Such advantages do carry a price - warm-blooded animals need much more food than their cold-blooded counterparts because their rapid metabolisms fatally malfunction if they cool down too much from lack of fuel.
(Excerpt) Read more at news.yahoo.com ...
YAY!!! Welcome to my life!!! YAY!!!!
“we’re all gonna die in 2012”
Only if Barry gets re-elected. LOL!
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