Study: Modern Brains Evolved Much More Recently Than Thought
Voice of America
Modern brains are younger than originally thought, possibly developing as recently as 1.5 million years ago, according to a study published Thursday. By that time, the earliest humans had already begun walking on two feet and had started fanning out from Africa.
Our first ancestors from the genus Homo emerged on the continent about 2.5 million years ago with primitive, apelike brains about half the size of those seen in today's humans. Scientists have been trying to solve a mystery for as long as our origin story has been known: Exactly when and where did the brain evolve into something that made us human? "People had thought that these humanlike brains evolved actually at the very beginning of the genus Homo, so about 2.5 million years ago," paleoanthropologist Christoph Zollikofer, a co-author of the study published in the journal Science, told AFP.Hannah Gutierrez-Reed, center, prepares for a sentencing hearing in state district court in Santa Fe, New Mexico, April 15, 2024. (Eddie Moore/The Albuquerque Journal via AP, Pool) FILE - A musician plays a violin behind a photograph of cinematographer Halyna Hutchins during a vigil in her honor in Albuquerque, New Mexico, Oct. 23, 2021.
Performers take part in the final dress rehearsal of the flame lighting ceremony for the Paris Olympics, at the Ancient Olympia site, Greece, April 15, 2024. Actress Mary Mina, playing a priestess, hands an olive branch to the first torch bearer, Greek olympic gold medalist Stefanos Douskos, during the final dress rehearsal of the flame lighting ceremony for the Paris Olympics at the Ancient Olympia site, Greece, April 15, 2024. Actress Mary Mina, playing a priestess, lights the flame during the final dress rehearsal of the flame lighting ceremony for the Paris Olympics, at the Ancient Olympia site, Greece, April 15, 2024. Performers take part in the final dress rehearsal of the flame lighting ceremony for the Paris Olympics, at the Ancient Olympia site, Greece, April 15, 2024.
FILE - Canada's Chloe Dufour-Lapointe competes in a World Cup freestyle moguls competition at Deer Valley Resort in Park City, Utah, on Jan. 14, 2022. A scoreboard at the University of Utah promotes Salt Lake City's bid to host another Winter Olympics in 2034 as International Olympic Committee members prepare to tour the stadium and other venues April 10, 2024, in Salt Lake City. The 2002 Winter Olympic rings are shown outside Rice-Eccles Stadium, April 10, 2024, in Salt Lake City.