7,845 results
7,845 results for: Geology
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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.
- Earth
World’s longest cave formation still growing
Minerals still accumulate in New Mexico’s Snowy River.
- Paleontology
Sail-backed dinos had semiaquatic lifestyle
Isotopic analyses of fossils suggest the carnivores had crocodile-like habits.
- Planetary Science
Signs of giant comet impacts found in cores
An uptick in ammonium may be evidence of a 50-billion-ton strike at the end of the ice age.
- Humans
BP spill: Gulf is primed to heal, but . . .
Every day, Mother Nature burps another 1,000 barrels of crude into the Gulf of Mexico, along with additional quantities of natural gas. Normally, these hydrocarbons don’t stick around long because local bacteria have evolved to eat them about as fast as they appear. Which is potentially good news, she explained in testimony during a pair of June 9 House subcommittee events on Capitol Hill, because those bugs are now in place to begin chowing down on the oil and gas entering the Gulf from BP's damaged Deepwater Horizon well.
- Animals
Wolverine: Climate warming threatens comeback
BLOG: New data point to unexpected sociability and filial behavior in carnivore.
- Earth
Bacteria show new route to making oxygen
New discovery adds to the few known biological pathways for making and metabolically using the gas.
