Earth
We summarize the week's scientific breakthroughs every Thursday.
- Earth
Roots of Climate: Plants’ water transport cools Amazon basin
Field tests in the Amazon have for the first time measured daily and seasonal movements of soil moisture through the deep roots of trees.
- Earth
Antibiotics afield
Antibiotics shed by livestock in manure can end up in crops or bound to soil, where they can foster disease-resistant germs.
- Earth
Global Wetting and Drying: Regions face opposing prospects for water supply
In the next half century, rivers and streams in some parts of the world will diminish in flow, while waterways elsewhere rise in output, according to a new analysis of climate simulations.
- Earth
Sex and the sewage
Chemicals in sewage sludge appear to have stunted the testes and fostered other reproductive-system changes in fetal lambs.
- Earth
Runaway Heat?
A variety of changes in the Arctic is making the region darker and accelerating its warming climate.
- Earth
Volcanic Suppression: Major eruptions can reduce sea level
Although scientists have known for years that major volcanic eruptions can temporarily cool Earth's climate, a team now suggests that such outbursts can temporarily cause sea level to drop for a while as well.
- Earth
Breaking Waves: Mangroves shielded parts of coast from tsunami
Along a strip of India's southeastern coastline, trees protected certain villages from last December's tsunami, while waves wiped out neighboring settlements that weren't sheltered by vegetation.
- Earth
Iceberg Thrills
The Ocean World Web site offers lessons devoted to icebergs, accompanied by dramatic images. Students can learn about the different colors of icebergs, their classification, and their life cycle. The Web site also presents the dangers that icebergs pose to people as well as their potential benefits to desert dwellers. It includes a glossary and […]
- Earth
Drought’s heat killed Southwest’s piñon forests
The heat accompanying a drought and a plague of bark beetles seem to explain the deaths of swathes of piñon pine trees across the Southwest in 2002 and 2003.
- Earth
The browning of Europe
The lengthy heat wave and drought that struck Europe in the summer of 2003 stifled the growth of vegetation and thereby reduced the amount of carbon dioxide that the continent's plants extracted from the atmosphere.
- Earth
Invisible Rivers
The fresh water that seeps from continents into coastal waters via submarine springs is a phenomenon that many scientists are just beginning to appreciate, model, and accurately measure.
- Earth
Fertility and Pollution: Dirty air, ozone linked to sperm troubles
Men develop lower sperm counts and produce more sperm with fragmented DNA when the air has higher levels of ozone and other pollutants.
