Notebook

  1. Health & Medicine

    Weekend warriors put up a fight against death

    Weekend warriors shove all their weekly activity into just one or two days, and it’s still enough to reduce mortality risk.

    By Bethany Brookshire
  2. Animals

    Pectoral sandpipers go the distance, and then some

    Even after a long migration, male pectoral sandpipers keep flying, adding 3,000 extra kilometers on quest for mates.

    By Emily DeMarco
  3. Animals

    For calmer chickens, bathe eggs in light

    Shining light on incubating eggs leads to calmer adult chickens, a study suggests.

    By Aylin Woodward
  4. Paleontology

    Pinhead-sized sea creature was a bag with a mouth

    Dozens of tiny fossils discovered in 540-million-year-old limestone represent the earliest known deuterostomes, a diverse group of animals that includes humans and sea cucumbers.