@quest 30 September 2021 more from that month

People may have walked along the shore of a lake in New Mexico 23,000 years ago... "Footprints left behind in layers of clay and silt at New Mexico’s White Sands National Park may be between 23,000 and 21,000 years old. That’s based on radiocarbon dating of the remains of grass seeds buried in the layers of sediment above and below the tracks. If the dates are correct, the tracks are evidence that people walked beside the now-dry Lake Otero during the height of the last ice age, when kilometers of ice covered the northern half of the continent. And that would mean that people must have arrived in North America—and made their way to an area well south of the ice—before the ice sheets expanded enough to close off the route." https://arstechnica.com/science/2021/09/23000-year-old-footprints-suggest-people-reached-the-americas-early/