Fossil wasp galls indicate little change in Southern California habitats since Ice Age

The La Brea Tar Pits, the world’s richest Ice Age fossil site, is famous for saber-toothed cats, mammoths, and giant sloths, but it also has numerous insect and plant fossils. New research on fossil galls—abnormal plant growths caused, in this case, by tiny wasps—helps reconstruct the local habitats of Southern California at the end of the last Ice Age. The work, led by Anna R. Holden of the Richard Gilder Graduate School at the American Museum of Natural History and the La Brea Tar Pits and Museum, was recently published in the journal Quaternary Research. —> Read More