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  1. 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.

    By Gwyneth Dickey
  2. Astronomy

    Mars organics get new lease on life

    More than three decades after the Viking mission failed to find compounds necessary for carbon-based life, a new analysis suggests they could actually be present at detectable levels in the planet’s soil.

    By Ron Cowen
  3. Earth

    What lies beneath

    Studies of geology, soils and agricultural demand may prove useful in forecasting the climate effects of deforestation.