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DENVER (KDVR) — Researchers at the Denver Museum of Nature and Science discovered a new mammal species from 65 million years ago. A fossil of a skull and jaws of the newly discovered species ...

Mammal bones, especially skulls, are used for identification, and to work out the evolutionary history of each species. The jaws of a house cat are more lion- than wolf-like, for example.

Biologist Katharine Edmonson asked the young boy who approached her table if he wanted to hold the tiger skull in his hands. Some children hesitate, but not 11-year-old Devin Shuman, a fifth-grader at ...