News
- Earth
Warm Spell: Arctic algae record shift in climate
Analyses of sediment samples taken from remote arctic lakes indicate that the climate across large swaths of the Northern Hemisphere has been warming for many decades.
- Health & Medicine
Measuring HIV’s Cost: Treatment adds years, but many still miss out
Medical care for people infected with HIV has already saved about 2 million years of life in the United States, but more than 200,000 HIV-infected Americans are not benefiting from drugs that could extend their lives.
- Physics
Brutal Bubbles: Collapsing orbs rip apart atoms
Spikes of heat and pressure in sonoluminescence caused by the implosions of light-emitting bubbles in liquids can strip atoms of electrons.
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Cytoplasm affects embryonic development
The DNA in a fertilized egg's mitochondria may play a pivotal role in the organism's growth.
- Health & Medicine
Protein may aid stroke recovery
Tests in mice have shown that erythropoietin, a red blood cell growth factor, can reverse brain damage caused by strokes.
- Astronomy
Hole power
New computer simulations and observations are adding to the evidence that supermassive black holes control the growth of the galaxies they inhabit, wielding an influence far beyond their gravitational grasp.
- Archaeology
Pottery points to ‘mother culture’
The Olmec, a society that more than 3,000 years ago inhabited what is now Mexico's Gulf Coast, acted as a mother culture for communities located hundreds of miles away, according to a chemical analysis of pottery remains and local clays from ancient population sites in the area.
- Earth
Baking dirt to predict erosion after a fire
Lab tests suggest that a wide variety of soils exposed to the heat of intense wildfires end up with a similar resistance to erosion, a finding that may help scientists model that process more accurately.
- Health & Medicine
Cell transplants make gains versus diabetes
Transplanting insulin-making cells from a single cadaver into people with type 1 diabetes can reverse the disease in some people.
- Earth
Winged solution to biopollution?
Government officials have released alien moths in hopes that they will rein in the spread of an aggressive climbing fern now invading some 100,000 acres in south Florida.
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Healing secret lies in blood
An unknown factor in blood may be the key to why young people and animals heal much faster than old ones do.
- Ecosystems
Return of the Wetlands? Restoration possible for some Iraqi marshes
Field studies conducted in Iraq last year suggest that some of the region's ecologically devastated marshes could be returned to health.
