7,733 results
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A violent tail
The MESSENGER spacecraft finds powerful magnetic storms on Mercury, along with signs of surprisingly recent volcanic activity.
- Earth
Feds up estimates of BP-spill rate
At a news briefing on June 10, Marcia McNutt, who chairs the National Incident Command’s brain trust of experts calculating the likely release rate of the ongoing Gulf of Mexico oil spill, pegged the best available estimates at between 20,000 and more than 40,000 barrels per day.
- Earth
Asteroid impact could have stirred the ocean
Model offers one explanation for sudden change in deep-ocean chemistry almost 2 billion years ago.
- Earth
Scientists scramble to analyze Haiti quake
Teams work to understand and model what could happen next.
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Book Review: Stories in Stone: Travels Through Urban Geology by David B. Williams
Review by Sid Perkins.
- Planetary Science
Before the Mississippi, minerals show ancient rivers flowed west
Michigan zircons uncover the path of an ancient river system across North America.
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Gems and Gemstones: Timeless Natural Beauty of the Mineral World by Lance Grande and Allison Augustyn
Gemstones are more than pretty baubles. Gems and their geological features are depicted in text and beautiful photographs. Univ. of Chicago Press, 2009, 369 p., $45. GEMS AND GEMSTONES: TIMELESS NATURAL BEAUTY OF THE MINERAL WORLD BY LANCE GRANDE AND ALLISON AUGUSTYN
- Anthropology
Contested evidence pushes Ardi out of the woods
A controversial new investigation suggests that the ancient hominid lived on savannas, not in forests.
- Earth
A fresh look at Mount St. Helens
Nearly 30 years after the peak’s major eruption, recovery has just begun.
- Earth
Earth’s atmosphere may be extraterrestrial in origin
Analyses of krypton, xenon hint that air didn’t fizz from within the planet.
- Life
Missing chemicals on Titan could signal life
Methane-based organisms on one of Saturn’s moons might be consuming the materials.
- Space
Geophysicists push age of Earth’s magnetic field back 250 million years
South African rocks suggest that the earliest stages of life on Earth were protected from harmful solar radiation.
