Add Yahoo as a preferred source to see more of our stories on Google. Alysson Muotri, Ph.D. Lead exposure shaped human evolution, influencing brain development and the rise of language. (CREDIT: Kyle ...

Humans' unique language capacity was present at least 135,000 years ago, according to a survey of genomic evidence. As such, language might have entered social use 100,000 years ago. It is a deep ...

Researchers found that ancient hominids—including early humans—were exposed to lead throughout childhood, leaving chemical traces in fossil teeth. Experiments suggest this exposure may have driven ...

Long before factories, mines, and cars filled the air with pollution, our distant ancestors were already living with a silent toxin: lead. A groundbreaking study reveals that hominids — from early ...