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[Anomalocaris]

Around 1920s, the diminished testicular emission theory aging by the French physiologist Charles Edouard Brown-Séquard Gained currency. so anti-aging treatment by transplanting of whole or sliced up testicles from cadavers into the scrotum of the patient became popular in Europe. When human gonads became scarce, Monkey testicle transplant became the primary means of anti agent treatment. This general means of anti aging treatment did not become quite late credited until attempt was made to transplant monkey ovaries into women, usually with considerably more disastrous results than transplant of monkey testicular tissue into men.