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Latest Isotopes of oxygen Stories

2012-07-03 10:28:50

Tree ring and oxygen isotope data from the U.S. Pacific Northwest do not provide the same information on past precipitation, but rather than causing a problem, the differing results are a good thing, according to a team of geologists. The researchers are trying to understand the larger spatial patterns and timing of drought in the arid and semiarid areas of the American West. "We generally understand that the Medieval Climate Anomaly, a warm period in much of the northern hemisphere...

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2010-04-01 14:25:18

Trailing like a serpent's spine along the western coast of South America, the Andes are the world's longest continental mountain range and the highest range outside Asia, with an average elevation of 13,000 feet. The question of how quickly the mountains attained such heights has been a contentious one in geological circles, with some researchers claiming the central Andes rose abruptly to nearly their current height and others maintaining the uplift was a more gradual process. New research...

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2009-07-09 06:00:00

The Earth has experienced many turning points over its 4.5-billion-year history, such as periods of extreme temperature changes, asteroids and the arrival and disappearance of various life forms.  But one of the most monumental events was the Cambrian-era explosion of life some 540 million years ago, when complex, multi-cellular life burst out all over the planet. Scientists point to this critical period as leading to life as we know it today, although its precise causes were not...


Word of the Day
penuche
  • A fudgelike confection of brown sugar, cream or milk, and chopped nuts.
'Penuche' is a variant of 'panocha,' a coarse grade of sugar made in Mexico. 'Panocha' probably comes from the Spanish 'panoja, panocha,' ear of grain.
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