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Thirty-two-million years after a saber-tooth cat stalked prey on the landscape known today as Badlands National Park, a 7-year-old girl working for her latest Junior Ranger badge spotted the animal's fossilized skull protruding from a hillside.
Holiday travelers flying out of the South Bay have been treated to short security lines and few cancellations this year.
The proposed age of these remarkable footprints was announced in 2021 by U.S. Geological Survey research geologists, but the finding was so extraordinary that it demanded additional testing.
Skeptics said footprints couldn't be 23,000 years old. Bay Area scientists proved they were.
New research confirms that fossil human footprints in New Mexico are likely the oldest direct evidence of human presence in the Americas, a finding that upends what many archaeologists thought they knew about when our ancestors arrived in the New World.