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  1. Animals

    Ancient poems document the decline of the Yangtze finless porpoise

    The porpoise is critically endangered. Ancient Chinese poems reveal the animal’s range has dropped about 65 percent over the past 1,400 years.

    By McKenzie Prillaman
  2. Animals

    Frog ribbits erupt via an extravagant variety of vocal sacs

    Shape matters as well as size in the great range of male frog show-off equipment for competitive seductive serenades.

    By Susan Milius
  3. Astronomy

    A gas cloud 5,500 times as massive as the sun lurks nearby

    At 300 light-years away, the interstellar cloud is the closest of its kind ever found to Earth and the largest apparent single structure in the sky.