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.
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SpaceAstronomers 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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FossilsDino 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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EarthWhen 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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EarthMeteorites 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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PlanetsHeavenly research
Groundbreaking research in astronomy landed four high school seniors spots as finalists in the 2014 Intel Science Talent Search.
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