MS-ESS1-4

Construct a scientific explanation based on evidence from rock strata for how the geologic time scale is used to organize Earth's 4.6-billion-year-old history.

  1. Chemistry

    Cooking up life for the first time

    The basic components for life could have emerged together nearly 4 billion years ago on the surface of Earth, chemists report.

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  2. Space

    Astronomers spy fastest speeding star

    A few stars have been spotted departing our galaxy. The fastest of these might have been propelled by another exploding star, a new study finds.

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  3. Fossils

    Dino double whammy

    Most scientists think an asteroid helped kill off the dinosaurs. But new calculations suggest that asteroid might have gotten some help from a long series of volcanic eruptions in what is now India.

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  4. Earth

    When life exploded

    Life exploded in diversity during the Cambrian Period. Experts are exploring what could account for this sudden change 540 million years ago.

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  5. Earth

    Meteorites likely wiped out Earth’s earliest life

    Enormous meteorites appear to have slammed into Earth several times early in its history. Each mega-smashup would have boiled off oceans and obliterated any bit of life.

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  6. Planets

    Heavenly research

    Groundbreaking research in astronomy landed four high school seniors spots as finalists in the 2014 Intel Science Talent Search.

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  7. Earth

    How Earth’s surface morphs

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  8. Space

    The dark side of the universe

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  9. Earth

    Deep drilling at sea

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  10. Fossils

    Did dinosaurs do handstands?

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