Collection: 2013 SN Top 25

  1. Physics

    Year in Review: Below absolute zero, but hot

    Lab trickery pushes atoms to a negative temperature.

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  2. Astronomy

    Year in Review: Death of a planet hunter

    The Kepler space telescope finishes a brilliant career.

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  3. Astronomy

    Year in Review: Voyager 1 reaches interstellar space

    The planetary probe is the first human-made object to break out of the heliosphere.

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  4. baby getting a shot
    Health & Medicine

    Year in Review: Putting kids at risk

    U.S. parents increasingly are delaying their children’s vaccination.

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  5. Climate

    Year in Review: Carbon dioxide levels pass milestone

    Although scientists are confident about humankind’s role in climate change, they still have a lot to learn about the magnitude and timing of future climate shifts.

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  6. Genetics

    Year in Review: Caffeine triggers cloning advance

    To successfully clone human cells, eggs must be dunked in the stimulant.

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  7. Humans

    Year in Review: Language learning starts before birth

    Babies seem familiar with vowels and words heard while in the womb.

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  8. Science & Society

    Year in Review: High court rules against gene patents

    The justices’ decision opens the way for choices in DNA testing.

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  9. Health & Medicine

    Year in Review: Sleep clears the cluttered brain

    Some forms of brain washing are good, like the thorough hosing the brain gets during sleep.

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  10. Life

    Year in Review: A double dose of virus scares

    Outbreaks of two deadly viruses captured the world’s attention in 2013, but neither turned into the global pandemic expected to strike one of these years.

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  11. Humans

    Year in Review: New discoveries reshape debate over human ancestry

    Human evolution appears poised for a scientific makeover as the relationships among early hominids are disputed.

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  12. Cosmology

    Year in Review: Planck refines cosmic history

    The satellite data hint at a slower expansion rate for universe.

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