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  1. Health & Medicine

    You’re Feeling Sleepy . . . : Anesthetics activate brain’s sleep switch

    Anesthesia's sedative effect may depend on activating sleep circuits in the brain.

    By John Travis
  2. Plants

    Time Capsules: Seeds sprout 120 years after going underground

    An experiment designed by a botany professor to last longer than his own life has demonstrated that seeds of two common flowers still sprout and blossom despite more than a century in a bottle.

    By Susan Milius
  3. Health & Medicine

    Flower Power: Corn lily compound stops cancer in mice

    A new study in mice suggests that cyclopamine, a plant derivative that causes birth defects in animals, can inhibit medulloblastoma, a brain cancer in children.