7,733 results
- Earth
Limiting Dead Zones
To limit algal blooms and the development of fishless dead zones in coastal waters, farmers and other sources of nitrate are investigating novel strategies to control nitrate runoff.
- Earth
Frosty Florida: Spread of agriculture may promote freezes
Planting crops in south Florida may have increased the risk of the freezes farmers hoped to avoid.
- Paleontology
Teeth tell tale of warm-blooded dinosaurs
Evidence locked within the fossil teeth of some dinosaurs may help bolster the view that some of the animals were, at least to some degree, warm-blooded.
- Earth
Large lake floods scoured New Zealand
A volcanic region of New Zealand’s North Island experienced immense floods and severe erosion when lakes filling the craters of dormant volcanoes burst through the craters' rims and poured down the slopes.
- Earth
Attack of the Rock-Eating Microbes!
Geologists who examine mineral transformations increasingly see bacteria at work, leading the scientists to conclude that if microbes aren't driving the underlying chemical reactions, at least they're taking advantage of the energy that's released.
- Earth
Model offers grounds for midwestern quakes
A new computer model may help explain how earthquakes can happen at fault zones located far from the edges of a tectonic plate.
- Anthropology
Ancestral Bushwhack: Hominid tree gets trimmed twice
In separate presentations at scientific meetings, two anthropologists challenged the influential view that the human evolutionary family has contained as many as 20 different fossil species.
- Paleontology
Ancient wood points to arctic greenhouse
Chemical analyses of wood that grew in an ancient arctic forest suggest that the air there once was about twice as humid as it is now.
- Earth
For European lakes, how clean is clean enough?
New research on lakes in Denmark suggests that agriculture has been affecting water quality there for more than 5,000 years.
- Humans
From the August 5, 1933, issue
A MILLION YEARS OF MAN A million years of the past history of man, as he climbed upward through the stone age, are recreated in exhibits and life-sized models and dioramas just placed on view by the Field Museum in Chicago. The exhibits represent the results of years of research, of several museum expeditions, and […]
- Planetary Science
Martian Invasion
If all goes according to plan, three spacecraft—one in December, two in January—will land on the Red Planet, looking for evidence that liquid water once flowed on its surface.
- Paleontology
Secrets of Dung: Ancient poop yields nuclear DNA
Researchers have extracted remnants of DNA from cells preserved in the desiccated dung of an extinct ground sloth.
