More Sexual Selection

 

Fertilization is not random, and the fastest sperm does not always win: in reality, the egg decides who succeeds.

While for decades we were taught that fertilization is a race won by the fastest sperm, a study published in Proceedings of the Royal Society B shows how human… pic.twitter.com/UMxdJ6Ft16

— Massimo (@Rainmaker1973) June 24, 2026