A lock of hair, 15 years of sleuthing and a 200-year-old question. In History by a Hair, Smithsonian Institution scholar Richard Kurin follows the DNA trail back to Thomas Jefferson.
New DNA analysis adds evidence Jefferson fathered children with Sally Hemings
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AI solved one of math’s hardest problems. Humanity learned nothing (so far)
OpenAI beat humans to solving the Navier-Stokes problem, but mathematicians say the AI's solution isn't telling them much.(Image credit: Karsten Moran/for The Washington Post)
