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  • Earth
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  • Feature

    How did Earth get its water?

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    Earth — a planet of oceans, rivers and rainforests — grew up in an interplanetary desert.

    When the solar system formed about 4.6 billion years ago, shards of calcium- and aluminum-rich minerals stuck together, building ever-larger pebbles and boulders that smashed together and assembled the rocky planets, including Earth.

    But Earth’s signature ingredient was...

    05/06/2015 - 11:14 Planetary Science, Astronomy
  • Feature

    Year in Review: New discoveries reshape debate over human ancestry


    Human evolution appears poised for a scientific makeover, as unexpected and provocative findings have raised new questions this year about two poorly understood periods leading to the emergence of Homo sapiens.

    The biggest conundrum comes courtesy of the oldest known DNA...

    12/20/2013 - 17:00 Ancestry, Archaeology
  • Feature

    Top 25 stories of 2013, from microbes to meteorites

    Last year it was easy to choose a story to lead our annual Top 25 list. The discovery of the Higgs boson was a watershed moment, ending a decades-long quest by thousands of physicists to fully describe the subatomic realm.

    This year, nothing so momentous came to pass. But science isn’t just about dramatic announcements and tremendous technical feats. Anyone who reads Science News...

    12/13/2013 - 15:00 Science & Society
  • Feature

    Evolution's Mystery Woman

    All hail Flo, the diminutive belle of the evolutionary ball. She made a flashy entrance in 2004 using the species name Homo floresiensis, given to her by her discoverers. Flashbulbs popped when the scientists announced the results of their analysis of Flo's partial skeleton and the assorted bones of other individuals uncovered on the Indonesian island of Flores.

    11/13/2006 - 10:17 Anthropology
  • Feature

    Evolutionary Upstarts

    Little more than a decade ago, an evolution revolution turned the study of the mind on its head. It began with a small band of researchers challenging the traditional concept that culture and child rearing serve as prime shapers of people's behavior. The renegade theorists instead touted a potent blend of evolutionary theory, genetics, and cognitive science for determining the underpinnings...

    09/17/2002 - 21:15