Hidden Away From Long Ago, The Shape Of Things To Come

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DENVER - A rock that sat untouched in a Pennsylvania museum’s fossil collection for years has rare full-body imprints of three ancient amphibians.Researchers found the imprints in sandstone rocks collected in eastern Pennsylvania decades ago and stored them in the museum in Reading, Pa. The body impressions of the salamander-like creatures are estimated to be 330 million years old, or about 100 million years before the first dinosaurs appeared.Many ancient footprints have been found, but a full-body animal impression is unusual. The three impressions show that the foot-long temnospondyls h