7,846 results
7,846 results for: Geology
- Earth
Why So Dry? Ocean temperatures alone don’t explain droughts
Evidence from ancient dunes points to three periods of prolonged drought in the U.S. Great Plains, but finding their causes may be more complex than previously supposed.
- Earth
Yes, it’s asbestos
Federal mineralogists have corroborated earlier evidence that Sierra-foothills communities around Sacramento, Calif., are built atop soils naturally laced with asbestos.
- Earth
Ice Age Ends Smashingly: Did a comet blow up over eastern Canada?
An extraterrestrial object apparently exploded above Canada about 12,900 years ago, sparking devastating wildfires and triggering a millennium-long cold spell.
- Archaeology
Rolling Back the Years
Scientists are refining carbon dating techniques to make the archaeological timeline more precise.
- Animals
Guys Roll Eyes: Fish show some eyeball to their rivals
During breeding season, male fish roll their eyes to send a quick "Back off, punk" signal to other males, researchers say.
- Earth
A Gemstone’s Wild Ride
Diamonds may be carried to the surface in explosions of gas and rock fizzing up from deep within Earth's mantle.
- Earth
Hey, What about Us?
The plight of polar bears may get most of the attention as climate change disrupts the Arctic ice, but plenty of other species, from walrus and seals to one-celled specks, are also going to see their world change radically.
- Ecosystems
Tortoise Genes and Island Beings
Geneticists and conservation biologists are joining forces to untangle the evolutionary history of giant Galápagos tortoises and to safeguard the animals' future.
- Planetary Science
No Escape: There’s global warming on Mars too
The overall darkening of Mars' surface in recent decades has significantly raised the Red Planet's temperature, a possible cause for the substantial, recent shrinkage of the planet's southern ice cap.
- Chemistry
Happy fish?
Researchers have detected antidepressant drugs in the brains of fish captured downstream of sewage-treatment plants.
- Paleontology
Ancient Extract: T. rex fossil yields recognizable protein
New analyses of a Tyrannosaurus rex leg bone reveal substantial remnants of proteins that strengthen the link between modern birds and dinosaurs.
- Paleontology
Of penguins’ range and climate change
Variations in the range of Adélie penguins along one section of Antarctica's coast during the past 45,000 years are a keen indicator of climate change there.
