Protein help fill the scrapbook in dino family tree (Reuters)

The reconstructed head of a Dromaeosaur-like Theropod dinosaur at the Australian Museum in Sydney, March 14, 2008. Scraps of protein from the bones of a 68 million-year-old dinosaur and a mastodon carcass confirm their places in the family tree of life on Earth, researchers reported on Thursday. (Will Burgess/Reuters) Reuters - Scraps of protein from the bones of a 68 million years, dinosaurs and a mastodon channel confirm their places in the tree Life on Earth, researchers reported on Thursday.

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