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  1. Particle Physics

    Readers question photons colliding, black sea snakes and more

    Readers had questions about brain flexibility, black sea snakes and photon collisions.

    By Science News Staff
  2. 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
  3. Astronomy

    Here’s what space toilets can teach us about finding signs of alien life

    Lessons learned from flushing space toilets can help researchers plan life-hunting missions to icy moons.

    By Lisa Grossman
  4. Earth

    How volcanoes may have ended the dynasty of Ptolemy and Cleopatra

    Volcanic ash in polar ice reveal a link between eruptions and the timing of revolts in Cleopatra’s Egypt.