How did the Moon form and how old is it? The most precise dating yet of Earth’s largest satellite found that it is much older than previously thought.
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Did These Curious Rock Formations Inspire the Great Sphinx?
New research says it’s plausible the Great Sphinx started life as a geomorphological oddity known as a yardang.
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Rivers Are Warming Up and Losing Oxygen
Researchers used deep learning to fill in the gaps of “patchy” water quality data, revealing decades-long trends toward warmer and less oxygenated rivers that could have worrisome consequences.
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Five Martian Mysteries That Have Scientists Scratching Their Heads
Despite centuries of study and many spacecraft visits, the Red Planet still holds secrets. Here are just a few.
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Water Corridors Helped Homo sapiens Disperse out of Africa
Wetland conditions during the last interglacial period in parts of the Levant helped propel our ancestors into Arabia, new research suggests.
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River Recovery from Drought Can Take Years
Climate change has created increasingly volatile weather and a drier atmosphere, making it harder for rivers to recuperate after a drought.
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Millions Likely Live in Areas Contaminated by Mining Runoff
Heavy metal contaminants from mining can live in ecosystems for centuries. A new global database shows where the problem is worst.
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Rogues’ Gallery Comes in Pairs
A new trove of free-floating planets, smaller and paired up more than expected, challenges stellar and planet formation models.
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Registros de eclipses fechan erupciones volcánicas de los siglos XII y XIII
Registros antiguos de lunas oscuras y lunas de sangre ayudan a los científicos a vislumbrar erupciones pasadas y sus efectos en el clima global.
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A Strong Quake (or Two) Rattled Puget Sound 1,100 Years Ago
Tree rings hint that two neighboring faults ruptured within 6 months of each other and suggest that the maximum magnitude of quakes around Puget Sound could exceed previous estimates.