You have to crawl before you walk… unless you don’t. While crawling is considered a major developmental milestone in most western countries, the ability to scoot on the ground isn’t a common practice everywhere – and it’s likely a new evolutionary invention.
That’s what David Tracer, anthropologist at the University of Colorado, has found. Tracer never intended to study crawling. He started working with the Au people in Papua New Guinea in 1988, doing surveys of child and maternal health and nutrition.
Read the full, original story here: Crawling: A New Evolutionary Trick?
