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  1. Health & Medicine

    A cellular secret to long life

    Longevity may depend in part on histones, proteins that keep DNA neatly spooled in the cell’s nucleus and help regulate gene activity.

    By Tina Hesman Saey
  2. Health & Medicine

    Mutated gene cited in some ovarian cancers

    The finding may help researchers devise a way to screen women with endometriosis for cancer risk.

    By Nathan Seppa
  3. Paleontology

    The hunchback of central Spain

    An exquisitely preserved dinosaur from central Spain has a hump on its back and suggestions of featherlike appendages on its arms. The primitive carnivore lived about 125 million years ago and may push back the first known instance of feathers on the dinosaur family tree.