Here's a bit more about it:
* Location: Beringia was a landmass that connected Siberia (in present-day Russia) to Alaska (in present-day United States). It existed during the last glacial period, when sea levels were much lower due to water being locked up in glaciers.
* Time: It's estimated that the land bridge was exposed between 30,000 and 11,000 years ago.
* Crossing: During this time, it is believed that small groups of people, likely hunter-gatherers, crossed from Asia into North America.
* Current Location: Beringia is now submerged under the Bering Strait, the body of water that separates Alaska from Russia.
It's important to note that the "land bridge theory" is the most widely accepted explanation for the peopling of the Americas, but it's still a subject of ongoing research and debate.