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  1. Animals

    Female chimps play with ‘dolls’

    Youngsters mimic mothering by cradling sticks, reigniting debate over sex differences in toy choices.

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  2. Space

    Cosmic reincarnation idea may be dead

    Cosmological patterns that were recently put forth as evidence for a pre–Big Bang universe are easily explained by current theory, critics say.

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  3. Earth

    Bugged forests bad for climate

    Trees savaged by pine beetles are slow to recover their ecological function as greenhouse gas sponges.

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  4. 2010 Science News of the Year: Science & Society

    Credit: Ayimages/Istockphoto Vaccine link to autism dismissed In February, Lancet formally retracted a 1998 study that had kindled a storm of opposition to vaccines (SN Online: 2/3/10).