Christopher Columbus reached the New World in 1492, but some experts say Polynesian explorers beat him to it. There's little evidence to support this fringe theory, but scientists have pointed to the presence of sweet potatoes, a plant thought to be native to the Americas, in the South Pacific as potential proof. A genetic analysis of the popular tuberous root and its relatives has now effectively quashed this hypothesis.
Tagged With early human migrations
It's just a lone, bony middle finger, but the scientists who found it say it's the oldest directly dated fossil of our species to ever be found outside of Africa and the Levant, a region that today comprises Israel, Syria, Lebanon and Jordan. But the new discovery is not without its critics, who say older evidence of human habitation outside of this region exists elsewhere, and that the finger might not even be human.