https://geneticliteracyproject.org/2025/11/24/quirks-of-evolution-why-the-testicle-size-of-humans-and-apes-varies-so-wildly-and-why-are-we-the-only-animal-with-chins/
Nov 25, 2025 - he human body is a machine whose many parts – from the microscopic details of our cells to our limbs, eyes, liver and brain – have been assembled in fits
testicle sizequirksevolutionhumanvs