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Groundwater Depletion Threatens U.S. Food Security
Researchers believe the nation’s food supply may be vulnerable to rapid groundwater depletion from irrigated agriculture. The study, which...
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Massive Impacts May Have Warmed Ancient Mars
Cosmic impacts that once bombed Mars might have sent temperatures skyrocketing on the Red Planet in ancient times, enough...
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Ghostly Gamma-Ray Beams Blast From Milky Way’s Center
As galaxies go, our Milky Way is pretty quiet. Active galaxies have cores that glow brightly, powered by supermassive...
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Huge Ancient Civilization’s Collapse Attributed to Climate Change
The mysterious fall of the largest of the world’s earliest urban civilizations nearly 4,000 years ago in what is...
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Why Aliens Won’t Attack Earth
Despite what the movies tell us, any aliens that visit Earth probably won’t want to enslave or vaporize us,...
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Hereditary Inequality Among Stone Age Farmers
A study of more than 300 Neolithic skeletons suggests evidence of “hereditary inequality” among farmers 7,000 years ago, researchers...
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Study Traces Origins of Monogamous Coupling
From an evolutionary standpoint, the key players in the mating game were males with poor fighting skills and females...
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Leakey: Evolution Debate Will Soon Be History
Noted paleoanthropologist Richard Leakey says scientific discoveries may soon make the debate over evolution a part of history. The...
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Shifting Trade Routes May Have Been Root Cause of Mayan Decline
The end of the classic Mayan civilization in the lowlands of Mesoamerica was likely expedited by shifting trade routes...
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Earth Took 10 Million Years to Recover From Mass Extinction
The Earth’s greatest mass extinction, 250 million years ago, was so severe that it took 10 million years for...