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AstronomyNewfound gas cloud may be graveyard of first stars
A 12-billion-year-old gas cloud, rich in hydrogen and helium but nothing else, may house the remains of the universe’s first stars.
By Andrew Grant -
PhysicsMore details on Stephen Hawking’s solution to black hole problem
Stephen Hawking and colleagues have finally provided more information about how black holes might preserve information.
By Andrew Grant -
EarthGround shakes expose faraway earthquake hot spots
A major earthquake in Costa Rica revealed faraway areas where fluids have weakened rock and boosted the risk of a major earthquake, new research suggests.
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AnimalsSmall lizard packs powerful tongue
A tiny chameleon from South Africa sets an acceleration and power record for amniotes.
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ArchaeologyRoman toilets didn’t flush parasites
Roman sanitation measures did little to dent parasite numbers, a study finds.
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AstronomyTo search for an advanced civilization, take a U-turn to star clusters
Globular star clusters might be safe, stable homes for long-lived advanced civilizations.
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Health & MedicineNew dietary guidelines emphasize big picture
Americans’ new guidelines for healthy eating focus on subtle shifts to dietary habits.
By Meghan Rosen -
GeneticsThe Iceman tells a new tale: Infection with ulcer-causing bacteria
Ötzi the Iceman was infected with a virulent strain of H. pylori. A new study is the first to piece together an ancient genome of these bacteria.
By Meghan Rosen -
OceansPhytoplankton flunk photosynthesis efficiency test
Nutrient-poor ocean waters make phytoplankton photosynthesis inefficient
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AstronomyThis black hole is an extreme recycler
A cosmic pump powered by a supermassive black hole is recycling gas through a galaxy.
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PaleontologySaber-toothed salmon teeth more like tusks than fangs
Saber-toothed salmon teeth may not have been positioned like fangs at all.
By Susan Milius -