When did Diplodocus become extinct?

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lived in late jurassic, between 154–150 million years ago, far longer end of dinosaurs ended 64 million years ago (cretaceous). dinosaurs lived @ end of cretaceous included triceratops, duck-billed, , t-rex. quite bit different jurassic dinosaurs preceded them. death asteroid theory disputed pretty knowledgeable paleontologists such robert baaker.

http://en.wikipedia.org/wiki/seismosauru...

please help! need in biology.


appreciate it.


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