News

  1. Health & Medicine

    Cooperative sperm outrun loners in the mating race

    Sperm that swim in clusters travel more directly toward the uterus, while overcoming fluid currents in the reproductive tract.

    By James R. Riordon
  2. Neuroscience

    Why traumatic brain injuries raise the risk of a second, worse hit

    Recent hits to Miami Dolphins quarterback Tua Tagovailoa have reignited discussions of brain safety for professional football players. Brain experts weigh in.

    By Laura Sanders
  3. Planetary Science

    Mars’ buried ‘lake’ might just be layers of ice and rock

    Evidence grows that possible detections of liquid water buried near Mars’ south pole might not hold water.

    By Katherine Kornei
  4. Life

    A metal ion bath may make fibers stronger than spider silk

    The work is the latest in a decades-long quest to create artificial fibers as strong, lightweight and biodegradable as spider silk.