During the last ice age, an enormous stretch of fertile grassland connected Eurasia and the Americas. Known today as Beringia, this lost landscape was home to a small but important population of humans. Now, the discovery of one skull in an underwater cave tells an intriguing story about what happened to the Beringians when they came to America.
Humans colonized most of the world, including Australia, tens of thousands of years before they settled in the Americas. It wasn't until the Earth's most recent ice age, 2o,000 years ago, that humans began their journey to the last remaining continent untouched by our species. Some may have come along the coast, in reed boats similar to the ones that took their ancestors to Australia. But thousands of them came across a land bridge that grew between the two continents as the ocean receded, it waters locked into glacier ice.