News
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PhysicsBar codes could be next to check out
New radio frequency tags would use nanotechnology to identify and track products.
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Health & MedicineExisting antibiotic might help keep wraps on AIDS virus
The acne drug minocycline inhibits HIV activation in infected immune cells, lab tests show.
By Nathan Seppa -
PaleontologyTyrannosaurs lived in the Southern Hemisphere, too
Australian fossils suggest the kin of T. rex dispersed globally 110 million years ago.
By Sid Perkins -
ChemistryBuilding a cheaper catalyst
Using perovskite instead of platinum in catalytic converters could shave many hundreds of dollars off the cost of a diesel car.
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HumansAncient DNA suggests new hominid line
Genetic data unveil a previously unknown Stone Age ancestor in central Asia.
By Bruce Bower -
EarthBacteria show new route to making oxygen
New discovery adds to the few known biological pathways for making and metabolically using the gas.
By Sid Perkins -
ChemistryBetter sleuthing through chemistry
New fingerprinting method can pinpoint where, when or how a chemical warfare agent came to be.
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PhysicsYou really can freeze hot water faster than cold*
Experiments suggest that impurities in the warmer water may explain the “Mpemba effect” in which warm water freezes faster than cold water.
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Health & MedicineUV radiation, not vitamin D, might limit multiple sclerosis symptoms
The rarity of MS in the tropics may be due to higher ultraviolet light exposure, not necessarily increased vitamin production, new research suggests.
By Nathan Seppa -
LifeHawaiian caterpillars are first known amphibious insects
Developing underwater or above, it’s all good for moths that evolved new lifestyle in the islands
By Susan Milius -
AnthropologyAncient footprints yield oldest signs of upright gait
Human ancestors may have been walking with an efficient, extended-leg technique by 3.6 million years ago.
By Bruce Bower -
Health & MedicineIngredient of dark roasted coffees may make them easier on the tummy
A compound generated in the roasting process appears to reduce acid production in the stomach.