Thursday, March 19, 2009

Dinosaurs Among Us

It seems that birds really are the descendents of dinosaurs. Both had feathers, and some dinosaurs may have lost their feathers later on. The dinosaurs never really went extinct. The smaller ones learned to fly and survived the asteroid impact.

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Perhaps some also evolved into reptiles and mammals?
 
Reptiles came before dinosaurs. They are likely the progenitors of mammals and birds, but I haven't checked an evolutionary tree lately. You can think of reptiles, mammals, and birds as separate branches of the tree within the Animal branch of Eucarya (nucleated cellular life).
 
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