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  1. Life

    Sexual conflict takes shape in ducks

    Up-close view of male ducks reveals extreme speed and extreme conflict.

    By Susan Milius
  2. Health & Medicine

    Texting and driving don’t mix, just as suspected

    Sending or receiving messages proves even worse than cell phone calls for young adults on simulators.

    By Nathan Seppa
  3. Life

    Lupus not identical in twins

    Differences in DNA methylation may account for why one sibling gets the autoimmune disease while the other stays healthy.

    By Tina Hesman Saey
  4. Life

    Groovy teeth suggest dinosaur was venomous

    Fossils show depression in upper jaw that held venom-producing glands.

    By Sid Perkins
  5. Space

    Herschel Space Observatory sees stars being born

    A recently launched infrared observatory has discovered about 700 newly forming stars.