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  1. Life

    Protein plays three cancer-fighting roles

    The tumor suppressor protein, p53, has three ways to protect cells from turning cancerous. A new study shows that p53 helps make microRNAs.

    By Tina Hesman Saey
  2. Life

    Sleeping ugly

    Analysis pinpoints genes that help springtails dehydrate and tough out the winter.

    By Laura Sanders
  3. Space

    Jupiter takes it on the chin

    Images reveal that an object has recently bashed into Jupiter, 15 years after the first of 21 chunks of Comet Shoemaker-Levy 9 struck the giant planet and created a memorable display of dark spots, waves and plumes.

    By Ron Cowen
  4. Life

    Web decorating with garbage

    Spider webs adorned with decaying food remains attract more attacks, but maybe there’s a defensive trade-off at work.