Ahmed Zewail, Egyptian-American chemist and academic, Nobel Prize laureate (born 1946)

Ahmed Hassan Zewail was an Egyptian-American chemist, known as the "father of femtochemistry". He was awarded the 1999 Nobel Prize in Chemistry for his work on femtochemistry and became the first Egyptian and Arab to win a Nobel Prize in a scientific field, and also the first African to win a Nobel Prize in Chemistry. He was a professor of chemistry and physics at the California Institute of Technology (Caltech), where he was the first Caltech faculty member to be named the Linus Pauling Chair of Chemical Physics and served as the director of the Physical Biology Center for Ultrafast Science and Technology.

The Nobel Prizes are awards administered by the Nobel Foundation and granted in accordance with the principle of "for the greatest benefit to humankind". The prizes were first awarded in 1901, marking the fifth anniversary of Alfred Nobel's death. The original Nobel Prizes covered five fields: physics, chemistry, physiology or medicine, literature, and peace, specified in Nobel's will. A sixth prize, the Prize in Economic Sciences, was established in 1968 by Sveriges Riksbank in memory of Alfred Nobel. The Nobel Prizes are widely regarded as the most prestigious awards available in their respective fields.