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  • Piercing Plumes Icy jets burst out of the south pole of Saturn’s moon Enceladus. The plumes, shown here in a 2009 image from the Cassini spacecraft, emerge in response to Saturn’s tides. more >>
    NASA/JPL, Space Science Institute
  • TIGER ALLEY Tigers prowl through strips of forest in central India, mixing genes and keeping the populations healthy. more >>
    S. Sharma and Trishna Dutta
  • CHILD SACRIFICE The mummified teenager known as the Maiden ingested copious amounts of alcohol and chewed coca leaves in the weeks before her death in an Incan sacrifice ritual, a new analysis of her tightly braided hair finds. more >>
    © Johan Reinhard
  • ANIMAL REVOLUTION A rise in oxygen may have allowed carnivores to evolve, a new study of polychaete worms (one shown) suggests. The origin of predators may have then kicked off an arms race that triggered the Cambrian Explosion more than half a billion years ago. more >>
    Christina Frieder
  • CARBON ON ICE In a 12-year lab study, thawing permafrost saturated with water lost less carbon than dry permafrost did (soil sample from Greenland shown). more >>
    B. Elberling
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