Thomas Perlmann, Secretary of the Nobel Assembly and the Nobel Committee, announces the winners of the 2021 Nobel Prize in Physiology or Medicine during a press conference at the Karolinska Institute in Stockholm, Sweden, Monday, Oct. 4, 2021. The Nobel Prize in the field of physiology or medicine has been awarded to U.S. scientists David Julius and Ardem Patapoutian. They were cited for their discovery of receptors for temperature and touch. The winners were announced Monday by Thomas Perlmann, secretary-general of the Nobel Committee. (Jessica Gow/TT via AP)
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