[–] AbjectSubstance 0 points 5 points 5 points (+5|-0) ago (edited ago)
https://en.m.wikipedia.org/wiki/C%C3%A2ndido_God%C3%B3i
Nazi doctor possibly found a way to genetically engineer humans to have a higher rate of twins. SA town still has 10x the rate of twin births.
Not saying it's a viable strategy, just a fun fact.