This handout photo taken on September 15, 2022 and released by the University of Massachusetts Medical School, Worcester, Massachusetts, on October 7, 2024 shows Victor Ambros, Silverman Professor of Natural Science. US scientists Victor Ambros and Gary Ruvkun won the Nobel Prize in Medicine on October 7 for their discovery of microRNA and its role in how genes are regulated. (Photo by Handout / UNIVERSITY OF MASSACHUSETTS MEDICAL SCHOOL / AFP) / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / UNIVERSITY OF MASSACHUSETTS MEDICAL SCHOOL" - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS (Photo by HANDOUT/UNIVERSITY OF MASSACHUSETTS MEDICAL SCHOOL/AFP via Getty Images)