Fun Fact: In 1905, American geneticist Nettie Stevens discovered sex chromosomes. This(00)

Fun Fact: In 1905, American geneticist Nettie Stevens discovered sex chromosomes. This(00)


Image gallery: How Was Sex Discovered

Fun Fact: In 1905, American geneticist Nettie Stevens discovered sex chromosomes. This History of Sex: Kinky, Sexy Acts People Did in Modern & Ancient History One of the earliest depictions of male sexuality ever discovered