Feature

  1. Life

    Hybrids reveal the barriers to successful mating between species

    Scientists don’t understand the process of speciation, but hybrids can reveal the genes that keep species apart.

    By Tina Hesman Saey
  2. Animals

    Scary as they are, few vampires have a backbone

    Researchers speculate on why there are so few vampires among vertebrates.

    By Susan Milius
  3. Animals

    Being a vampire can be brutal. Here’s how bloodsuckers get by.

    Blood-sucking animals have specialized physiology and other tools to live on a diet rich in protein and lacking in some nutrients.

    By Susan Milius
  4. Health & Medicine

    A universal flu shot may be nearing reality

    Scientists are developing a universal vaccine against flu, making annual shots a thing of the past.