Anthropology / Everything Human

Surprise! Semen Is Required

Body

  • Origins

    Not all frogs begin as tadpoles. However, Lazzaro Spallanzani was the first to show that all frogs, dogs, and humans begin growing only if a male contributes his essence to the process.

    Surprise! Semen Is Required

    Reproduction seems so obvious to us now. Even if we don’t know the details, we know about the birds and the bees. For humans and an overwhelming number of other species, both female and male contribute stuff that, together, transmogrifies into babies. These days we take our understanding of the baby-making process so much for granted that it’s amusing to look back at the intellectual struggles of early …

  • News

    neanderthal DNA - Humans and Neanderthals interbred about 50,000–60,000 years ago. The genetic legacy of those liaisons, including possibly depression, is only now coming to light.

    I’ve Got the Neanderthal Blues

    New research suggests that depression risk, smoking addiction, and other health and cognitive traits may be partially shaped by the Neanderthal DNA that persists in modern humans.