Archeologists believe this is when receding glaciers probably first opened an ice-free corridor through Canada between Alaska and the rest of the Americas. The conundrum: How did people get to Cactus Hill and Monte Verde before this?
13,000 years ago:
People were living near Clovis, New Mexico, where tools from this era were found in the 1930s. This find gave rise to the widely held Clovis First theory that people spread through the Americas only after the Ice Age.
11,000 years ago:
As the Ice Age ends, melting glaciers raise sea levels 120 metres, submerging the land bridge between Alaska and Siberia.
GGG Ping.