Fossil insect traces reveal ancient climate, entrapment, and fossilization at La Brea Tar Pits

The La Brea Tar Pits have stirred the imaginations of scientists and the public alike for over a century. But the amount of time it took for ancient animals to become buried in asphalt after enduring their gruesome deaths has remained a mystery. Recent forensic investigations, led by Anna R. Holden of the Natural History Museum of Los Angeles County (NHM) and colleagues, reveal new insights into fossilization and the prevailing climate at the Rancho La Brea Tar Pits toward the end of the last Ice Age.

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