Northwest science news roundup: Really old humans, jellyfish jets, better cookies and winter slumber

In this monthly rundown from OPB, “All Science. No Fiction.” creator Jes Burns features the most interesting, wondrous and hopeful science coming out of the Pacific Northwest.

And remember: Science builds on the science that came before. No one study tells the whole story.

Getting to the point

For decades, scientists have debated when humans first crossed from Asia to North America. And for a long time, 13,500 years ago was the date — that’s when the Bering Land Bridge between what’s now Alaska and Russia was exposed.

But more recently, archeological discoveries have pushed that first-arrival date way back. Researchers from Oregon State University are adding to the evidence of an earlier migration.

They’ve dated 14 projectile points (similar to arrowheads) found at an early-human site on traditional Nez Perce land in Idaho to…



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