The Last Glacial Maximum, also referred to as the Last Glacial Coldest Period, was the most recent time during the Last Glacial Period where ice sheets were at their greatest extent between 26,000 and 20,000 years ago. From Wikipedia
Employing radiocarbon dating on ancient mud sourced from the tracks, researchers have confirmed that human footprints at White Sands predate the Clovis culture by roughly 10,000 years
