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ChemistryHeadache tree is a pain in the brain
Following a gardener’s lead, researchers discover an ingredient in bay laurel that causes uncomfortable swelling of cranial blood vessels.
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PaleontologyTooth stranger than fiction
A mammal fossil unearthed in South America resembles ‘Ice Age’ saber-toothed squirrel.
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LifeThe origin of orbs
Spectacular web designs trace back to a single spider origin.
By Nick Bascom -
SpaceMars’ history is a fluid situation
Recent data from two spacecraft suggest the planet was mostly dry and cold, with a wet, warm subsurface.
By Nadia Drake -
EarthPollution may be strengthening Asian cyclones
Sooty brown clouds may underlie the recent emergence of mega-storms striking from India to the Middle East.
By Janet Raloff -
LifeAxing molecular zombies may slow aging
Killing off dormant cells slows the decline of mice genetically engineered to grow old fast.
By Nick Bascom -
HumansHumans’ entry into Europe pushed earlier
Homo sapiens fossils from Italy and England point to an early arrival and a longer time living alongside Neandertals.
By Bruce Bower -
PhysicsThe sound of screech
Auditory experts decipher the blood-curdling nature of fingernails on a chalkboard.
By Devin Powell -
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LifeNearness key in microbe DNA swaps
Close quarters, like those inside the human body, are the most important factor in determining how often bacteria pick up one another’s genes.