Ice‑Age Climate Shocks and Site Reuse

Repeatedly dated human footprints at White Sands show people returned to the same basin across ~1,800 years during the last glacial maximum while the lake and vegetation shifted rapidly. The evidence ties occupation and movement directly to abrupt local environmental swings (droughts, salinity changes), suggesting early peoples tracked and exploited transient resource concentrations. — This reframes early migration debates: humans in Pleistocene North America did not just arrive earlier, they repeatedly navigated extreme, fast climate variability—relevant to discussions of human resilience, migration models, and how we interpret sparse archaeological records.