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Victor Ambros is a biologist renowned for his groundbreaking research on microRNAs (miRNAs). miRNAs are small non-coding RNA molecules that play a crucial role in gene regulation. Ambros' discovery of miRNAs in 1993 revolutionized the understanding of gene expression and earned him the title of "father of microRNAs." His work has paved the way for novel therapeutic approaches targeting miRNAs in various diseases, including cancer and neurodegenerative disorders.