Scientists spur debate over First Americans

Mastodon unearthed
San Diego Natural History Museum paleontologist Don Swanson points to a rock fragment near a large piece of a mastodon tusk at the excavation site. (San Diego Natural History Museum Photo)

Scientists say the patterns of breakage in mastodon bones found 25 years ago near a San Diego highway suggest that humans battered the beast 130,000 years ago.

That’s a shocker, because before now, the oldest widely accepted evidence of human habitation in North America goes back only about 16,000 years. If the scientists are right, that makes the place they studied, known as the Cerutti Mastodon site, the oldest archaeological site in North America.

“It’s somewhat mind-boggling to have 130,000 years proposed,” said University of Oregon archaeologist Dennis Jenkins. He has found previous evidence for human habitation in 14,000-year-old preserved poop but wasn’t involved in the latest study, published today by the journal Nature.

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By Alan Boyle

Mastermind of Cosmic Log, contributing editor at GeekWire, author of "The Case for Pluto: How a Little Planet Made a Big Difference," president of the Council for the Advancement of Science Writing. Check out "About Alan Boyle" for more fun facts.

One reply on “Scientists spur debate over First Americans”

Visitors from the non-Mongoloid Old World may have been more numerous than previously believed in the past few thousand years. Thus, there are other controversies about the “first Americans”.

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