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Pluto May Have Formed from 1 Billion Comets
May 24, 2018 | ArticlePluto may have long ago coalesced from 1 billion or so comets, a new analysis of data from NASA's New Horizons mission and the European comet-orbiting Rosetta probe suggests.
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Mysterious Medium-Size Black Holes May Lurk at the Centers of Small Galaxies
May 23, 2018 | ArticleThe hearts of small galaxies may hide a mysterious kind of black hole that has long proved elusive: medium-size black holes with masses between the mass of a few suns and that of millions of suns, a new study finds.
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New Controversial Idea About Stonehenge Has Archaeologists Shaking Their Heads
May 23, 2018 | ArticleIn a new book, this scientist says glaciers, not Neolithic people, carried the huge rocks to Stonehenge.
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Something Is Sucking Iron Out of Earth's Crust, and Scientists Think They Know What
May 23, 2018 | ArticleEarth would look a lot more like Mars if a mysterious mineral wasn't sucking iron out of the planet's crust. Scientists think they now know the culprit — and it's a gemstone.
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Watch Lightning Flashes from Space in These Mesmerizing Satellite Videos
May 23, 2018 | ArticleThe Midwestern United States is ablaze in a striking new satellite video captured by a lightning-mapping instrument aboard the National Oceanic and Atmospheric Administration's GOES-17 weather satellite.
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Ceres: The Smallest and Closest Dwarf Planet
May 22, 2018 | ReferenceCeres is a dwarf planet, the only one located in the inner reaches of the solar system. It is the largest object in the asteroid belt.
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Could Recent Supernova Explosions Have Caused Mass Extinctions on Earth?
May 22, 2018 | ArticleTwo nearby supernovae that exploded about 2.5 and eight million years ago could have resulted in a staggered depletion of Earth's ozone layer, leading to a variety of repercussions for life on Earth.
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NASA Satellites Track Unusual Changes in Earth's Water Supplies
May 22, 2018 | ArticleFresh water is changing around the world, and a new set of NASA satellite observations is helping scientists better understand why. The causes range from human activities to natural variations in the climate.
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Jupiter's Great Red Spot Is Spectacular (and Weird) in This Juno Photo
May 22, 2018 | ArticleA gorgeous photo by NASA's Juno spacecraft shows Jupiter as you've probably never seen it before.
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Jupiter's Great Red Spot: Photos of the Solar System's Biggest Storm
May 22, 2018 | Image AlbumJupiter's Great Red Spot — the most powerful storm in the solar system — is an planetary icon. See photos of the giant storm, which has been shrinking over time, in our full gallery here.
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