News
- Earth
Bacteria show new route to making oxygen
New discovery adds to the few known biological pathways for making and metabolically using the gas.
- Chemistry
Better sleuthing through chemistry
New fingerprinting method can pinpoint where, when or how a chemical warfare agent came to be.
- Physics
You 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.
- Health & Medicine
UV 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.
