Illustration of the French physicist Pierre Agostini (born 1941). In 2001 Agostini and colleagues generated the first series of consecutive attosecond (one billionth of a billionth of a second) pulses of light, with each pulse lasting just 250 attoseconds. Such short pulses allow the behaviour of electrons in atoms and molecules to be studied. Agostini was awarded a share of the 2023 Nobel Prize in Physics, along with Anne L'Huillier and Ferenc Krausz, for his work.

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Photo credit: © GARY BROWN/SCIENCE PHOTO LIBRARY / Alamy / Afripics
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