Surgeon Implanted Chimp Testicles in Thousands of Aging Men in Quest to Reverse Aging

French surgeon Serge Voronoff performed experimental operations on thousands of aging men, implanting chimpanzee testicles in an attempt to restore their youth and sexual vigor. Voronoff believed this radical procedure could slow the aging process, though the scientific basis for his theory was fundamentally flawed. The controversial surgeon became notorious for his bizarre anti-aging experiments during the early 20th century, when medical ethics and oversight were far less stringent than today. His work represents one of the more extreme examples of pseudoscientific attempts to combat aging, reflecting both the desperation of patients seeking youth and the lack of rigorous scientific standards in experimental medicine of that era.