Tens of thousands of years ago, Homo sapiens embarked on a major migration out of Africa and began settling around the world. But exactly how, when and where humans expanded has long been a source of debate. Now, researchers have used genomic sequencing to trace what they’re calling the “longest migration out of Africa.” Over the course of many generations and thousands of years, humans from Eurasia trekked more than 12,400 miles to eventually reach the southernmost tip of South America, according to a new paper published in the journal Science. In addition to providing insight into human expansion throughout...