Our Versatile Shoulders, Elbows Evolved As Early Apes' Safety Brakes For 'Downclimbing' | Weather.com - The Weather Channel
weather.comSubmitted by theweatherchannel5332 in science
Flexible shoulders and elbows, passed down from ancestral apes, might have allowed early human ancestors like Australopithecus to climb trees at night for safety and descend during daylight, unscathed.