Scientists are one step closer to pinpointing fragments of Leonardo da Vinci’s elusive DNA. A team of researchers from the ...

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NPR's Juana Summers talks with Science correspondent Richard Stone about recent developments in the search for Leonardo da Vinci's DNA.

In a way, sequencing DNA is very simple: There's a molecule, you look at it, and you write down what you find. You'd think it would be easy—and, for any one letter in the sequence, it is. The problem ...