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American Museum of Natural History

Fighting Dinos

For Students 6th - 12th
A famous fossil of fighting dinosaurs holds as many questions as answers. Scholars first analyze the fossil itself by virtually highlighting the specific bones of the dinosaurs and read about their function and importance. They then test...
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Dinosaur Extinction: One More Hypothesis

For Students 9th - 10th
"The survivals and extinctions at the close of the Cretaceous are such as might be expected to result from intensely hot winds such as would be generated by extra large meteoritic impacts." This article suggests that this theory should...
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Dinosaurs' End, the Gravitational Hypothesis

For Students 9th - 10th
The author of this site feels that there are too many problems with the current theories for why dinosaurs became extinct. He believes that his gravitational hypothesis is the correct answer, the dinosaurs suddenly got too heavy.