RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / AMERICAN MUSEUM OF NATURAL HISTORY/N. WONG AND M. ELLISON" - NO MARKETING - NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS
TOPSHOT - This undated handout photo obtained August 21, 2019 courtesy of the American Museum of History shows a fossil skull of Chilecebus carrascoenis, a 20-million-year-old primate from the Andes mountains. - The remains of a prehistoric primate that lived high in the Andes mountains 20 million years ago and was so small it could fit in your hand is helping scientists learn more about how human brains evolved. In a study published August 21, 2019, in the journal Science Advances, researchers in China and the US used high resolution imaging to examine the only known fossilized skull the extinct Chilecebus, a New World monkey that scampered around ancient forests, feeding on leaves and fruit. One key finding: the brain size of primates, long assumed to have increased progressively over time, now appears to have followed a more roundabout path. (Photo by HO / American Museum of Natural History / AFP) / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / AMERICAN MUSEUM OF NATURAL HISTORY/N. WONG AND M. ELLISON" - NO MARKETING - NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS