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  1. Health & Medicine

    Stem Cell Success: Mice fuel debate on embryo cloning

    In mouse studies, scientists have used a technique called therapeutic cloning to create personalized replacement tissue.

    By John Travis
  2. Health & Medicine

    Eight hours of sleep may not be so great

    Sleeping 8 to 9 hours a night doesn't necessarily translate into a longer life.

    By Nathan Seppa
  3. Health & Medicine

    Alzheimer’s disease vaccine abandoned

    Safety concerns forced the shelving of tests of an experimental vaccine for Alzheimer's disease.

    By John Travis
  4. Plants

    Fringy flowers are hard to dunk

    The fringe on the edges of the floating blooms of water snowflake flowers helps protect the important parts from getting drenched in dunkings.