News
- Earth
Trouble for forests of the northern U.S. Rockies?
Climate change over the coming decades may cause forests in northern portions of the U.S. Rockies to stop absorbing carbon dioxide from the atmosphere and instead become net emitters of the gas.
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How sea turtle hatchlings know where to crawl
Newly hatched sea turtles use a variety of senses, not just sight, to find their way to the ocean.
- Earth
Darker days during Arctic summer
Satellite observations indicate that Arctic regions reflected less sunlight into space in the summer of 2006 than in other recent years, a change that may exacerbate the warming of Earth's climate.
- Earth
Dust Bowl affected midwestern climate
During the Dust Bowl of the 1930s, immense clouds of airborne soil blocked so much sunlight that much of the Great Plains region was significantly cooler than normal during summer months.
- Earth
Age and gender affect soot’s toxic impact
Except in young females, small blood vessels in rodents lost the ability to precisely regulate blood flow after exposure to an oily constituent of diesel soot.
- Health & Medicine
Right combination of malaria drugs?
Children in Uganda who contract malaria recover faster with a drug based on artemisinin, derived from Chinese wormwood, than with a longstanding medical remedy.
- Health & Medicine
Nutrients linked to brain lesions
The more calcium and vitamin D elderly individuals consume, the greater the number and size of lesions that show up in their brains.
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Mental letdown for antipsychotic meds
People with chronic schizophrenia get surprisingly modest improvements in memory and learning from new as well as old antipsychotic medications.
- Earth
Storm Norms: Caribbean corals and sediments yield clues to hurricane frequency
The recent increase in hurricane activity in the North Atlantic, a phenomenon that some scientists blame on climate change, actually reflects a return to normal after a lull in the 1970s and 1980s.
- Astronomy
Galactic Émigré: Incoming dwarf galaxy could feed its larger kin
A dwarf galaxy at the periphery of the giant Andromeda galaxy may be a pristine building block for forming galaxies in the modern-day universe.
- Animals
Scary Singing: Precise birds signal, ‘Don’t mess with us’
A pair of magpie-larks can advertise their toughness by the precision of the duets they sing.
- Health & Medicine
Blending In: Dissolvable stents promise to protect arteries
A biodegradable magnesium stent props open clogged blood vessels and then dissolves, circumventing the problems linked to permanent metal stents.
