Environmental activists throw soup at Leonardo da Vinci's "Mona Lisa" painting at the Louvre museum in Paris on Jan. 28. (David Cantiniaux / AFPTV / AFP via Getty Images) To the editor: I have felt ...

PARIS, France — The “Mona Lisa” has given up another secret. Using X-rays to peer into the chemical structure of a tiny speck of the celebrated work of art, scientists have gained new insight into the ...

To the editor: I have felt for some time that a driving force in the fracturing of our society is that too many of us have ascribed to the once-abhorrent view that the ends justify the means. I was ...

PARIS (AP) — The “Mona Lisa” has given up another secret. Using X-rays to peer into the chemical structure of a tiny speck of the celebrated work of art, scientists have gained new insight into the ...