17 天
Discover Magazine on MSNPrehistoric Human Footprints and Tracks Hint at a 22,000-Year-Old Transporting ToolLearn about the tracks and footprints at White Sands National Park in New Mexico, possibly representing the earliest evidence of human-made transportation technology.
来自MSN2 个月
Giant sloths and mastodons coexisted with humans for millennia in Americas, new discoveries ...And the White Sands footprints preserve a few moments of their early interactions. As Odess interprets them, one set of tracks shows “a giant ground sloth going along on four feet” when it ...
During the Ice Age, some mammals were particularly large. The giant sloth had adapted very well to the climatic conditions. The reason for its extinction was unclear for a long time - until ...
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