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Dinosaur Discoveries

Dinosaur Discoveries

New Research on Appearance of First Rodents

For years, scientists have been disputing about the timing of the first appearance of rodents on Earth.

Recent discoveries of two new fossils are evidence that the earliest rodent species began about 57.7 to 58.9 million years ago. Being one of the most diverse species on earth, this rodent discovery is monumental for scientists to continue to determine the first origins of placental mammals.

For more on this discovery, visit the Examiner.

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2012 The Jim Henson Company. JIM HENSON'S mark & logo, SID THE SCIENCE KID mark & logo, characters and elements are trademarks of The Jim Henson Company. All Rights Reserved.

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