Astronomers have discovered an icy ball in the dark and frigid regions of the outer solar system, which they suspect harbors secrets to the solar system's formation and evolution.
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Climate Warming May Have Helped Kill the Dinosaurs
New evidence indicates ancient warming spells that coincided with prodigious volcanism and a powerful meteorite impact, both seen as possible causes of mass extinctions about 66 million years ago.
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Surveying Alaskan Minerals from Afar
By using hyperspectral imaging, researchers test their ability to find copper in remote areas.
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Tougher Guidelines Issued for Alaska Offshore Drilling
The regulations will reinforce safety mechanisms and provide stronger planning efforts and enhanced regulatory certainty, according to the Department of the Interior.
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Exoplanet Found in Curious Triple-Star System
The newly discovered planet balances precariously in orbit within the star system, puzzling scientists.
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Former Academy Head Predicts Few Obstacles for Female Successor
Prior to retiring last week as president of the U.S. National Academy of Sciences, Ralph Cicerone said the academy is ready for its new leader to be a woman and a younger person.
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Juno Spacecraft Nails Its Orbit Around Jupiter
The mission will spend 20 months collecting data on the planet's core, its magnetic field, and the composition of its atmosphere.
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Telica Volcano Rested Quietly Right Before Spewing Ash
The length of quiet periods predicts the severity of eruption events, according to a new model that might soon help forecast explosions worldwide.
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Antarctica's Ozone Hole Is Healing, Scientists Say
The ozone hole over Antarctica has shrunk by 16% since its peak in 2000, and some suspect it may disappear entirely by midcentury.
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Academy Head Says Political Rancor Harms Science, Society
The retiring National Academy of Sciences president says allegations that climate change is a fraud are deeply upsetting. But he hopes rabid partisanship can be eased.