Scientists can’t decide if shoulders of giants were broader or just better organized

The people who lived in Tasmania 8,000 years ago were pretty sophisticated, technologically speaking. They made bone tools, boomerangs, nets for catching a variety of prey and warm clothing to protect themselves from blustery weather. But when Europeans came upon that island, off Australia’s southern coast, just a few centuries ago, they found some of the most primitive hunter-gatherers in the world — subsisting without seaworthy vessels, sewn clothing or bone tools of any kind.