Contact: Iqbal Pittalwala
University of California - Riverside
Caption: Active fossil excavation site, Pit 91, located at the Rancho La Brea tar pits, Los Angeles, Calif. Pit 91 has yielded thousands of animal fossils.
Credit: D. E. Crowley, UCR.
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Related news release: New petroleum-degrading bacteria found at Rancho La Brea Tar Pits in Los Angeles