113,337+ results
113,337+ results for:
- Earth
Arctic seafloor a big source of methane
Measurements show that Arctic undersea methane deposits, previously thought to be sealed by permafrost, are leaking into the atmosphere.
- Life
Researchers distinguish two different types of blood stem cells
Working in mice, scientists find that red and white blood cells arise from different progenitors.
- Physics
Aluminum superatoms may split water
Metal clusters could create hydrogen for fuel, simulations suggest.
- Space
Spirit: ‘The reports of my death have been greatly exaggerated’
The Mars rover makes a small, but promising, move.
- Health & Medicine
Old drug may be first choice for childhood petit mal epilepsy
Three-way trial shows ethosuximide edging out two newer choices.
- Earth
Earth knocked for a loop
Chile’s February 27 temblor, tectonically linked to another giant quake 50 years ago, sped up the Earth’s rotation and tipped the planet’s axis.
- Chemistry
Plasticizers kept from leaching out
‘Chemicals of concern’ may be made safer in new materials.
- Space
Lopsided stellar disks help black holes guzzle gas
Theorists have found a new recipe for feeding the supermassive centers of galaxies.
- Agriculture
Frogs: Clues to how weed killer may feminize males
Atrazine, a widely used agricultural herbicide, not only can alter hormone levels in the developing frogs, but also perturb their physical development — and lead to an excess number of females, researchers report. Their new findings may help explain observations reported by a number of other research groups that at least in frogs, fairly low concentrations of atrazine can induce a feminization — or demasculinization.
- Life
Rise of female weaponry driven by poop fights
Motherly fights for excrement in one species of dung beetle have favored the evolution of a special female horn.
- Health & Medicine
Coffee not linked to heart arrhythmia
A large survey of insured people finds no extra hospitalizations in java swillers.
- Paleontology
Ancient DNA suggests polar bears evolved recently
A study of a rare Norwegian fossil narrows down when polar bears evolved and finds they are closely related to modern-day brown bears in Alaska.
