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North America’s oldest footprints tell a story of drought and survival

Earth.com · By Eric Ralls ·

North America’s oldest footprints tell a story of drought and survival

The Brief

  • Ancient footprints at White Sands in New Mexico date to the last ice age.
  • The footprint makers watched a lake shrink into a flat, salty mudflat called a playa.
  • The source article is truncated, so further details about the findings are not available here.

Why it matters

The footprints suggest ice-age landscapes could change noticeably within a single lifetime, challenging the idea that they barely changed across generations.

The last ice age can sound like a time when landscapes barely changed across generations. But ancient footprints at White Sands tell a different story. At White Sands in New Mexico, the footprint makers watched a lake shrink into a flat, salty mudflat called a playa, and a pine…

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