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SCIENCE IN THE NEWS DAILY

Harsh Climate Scoured Early Earth, Study Says

from National Geographic News

Earth's early atmosphere may have been highly corrosive to rocks, gradually dissolving away all but the toughest of minerals, a new study suggests.

The findings could explain a gap in Earth's geologic record that has puzzled scientists.

"It's possible that [the new study] answers the riddle," said Takayuki Ushikubo, a geologist at the University of Wisconsin, who led the study published online in the journal Earth and Planetary Science Letters.

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PODCASTS: Expanding With the Cosmos

Using the Atacama Cosmology Telescope (ATC), a 6.5-meter microwave collector in Chile, cosmologists are piecing together the early history of the known universe. In an exclusive American Scientist interview, Arthur Kosowsky—a member of the ATC team and a professor in the Department of Physics and Astronomy at the University of Pittsburgh—discusses how he is using ATC to reach back in time billions of years to search for gravitational waves that could verify inflation and reveal unprecedented details about how the cosmos was born.

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