Human Evolution’s ‘Shadow Species’
Carl Sagan observed that the frontal lobe of the human brain, comprising more than two-thirds of our brain mass, is where “matter is transformed into consciousness.” Maybe, suggest scientists, we’ve had the story of human evolution wrong: that language evolved before our brains started getting larger (we have brains 3x the size of apes), and language led to brain size increase instead of being a result of it?