7,847 results
7,847 results for: Geology
- Earth
Footprints could push back tetrapod origins
Newly discovered trackways much older than previous evidence for sea-to-land transition.
- Earth
GPS bolsters view that big Cascadia quakes could hit inland
Satellite tracking of plate movements shows that a magnitude-9 tremor in Pacific Northwest could strike close to urban areas.
- Space
Titan may host prebiotic brew
Saturn’s moon Titan may harbor a prebiotic mix of chemicals similar to those present at the dawn of life on Earth.
- Earth
Age of solar system needs a fresh look
Honed measurements show age overshot by amount significant to earliest stage of formation.
- Earth
Small earthquakes may not predict larger ones
Quakes far from tectonic plate boundaries may simply be aftershocks of ancient temblors.
- Anthropology
Ancient Maya king shows his foreign roots
Copán’s first king may have been part of a colonial expansion by another, distant Maya kingdom.
- Earth
Johnstown Flood matched volume of Mississippi River
A modern survey of terrain determines flow rate of the 1889 flood that was one of America's deadliest disasters.
- Space
Volcanic and ferric surprises on Mercury
Volcanic activity is more recent than expected, MESSENGER shows on its third flyby of the planet. Also, surface iron occurs as oxides.
- Agriculture
EPA reviews hints of weed killer’s fetal risks
The Environmental Protection Agency will be convening meetings of its Scientific Advisory Panel on pesticides throughout 2010 to probe concerns about the safety of atrazine, a weed killer on which most American corn growers rely. The first meeting of these outside experts started Tuesday. And although a large number of studies have indicated that atrazine can perturb hormones in animals and human cells — and might even pose a possible risk of cancer amongst heavily exposed people, these outcomes were not the focus of EPA’s review Tuesday. Risks to babies were.
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Engineering a cooler Earth
Researchers brainstorm radical ways to counter climate change.
- Earth
Arctic images declassified
High-res Arctic sea images should be declassified, says National Research Council.
