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2 articles from ScienceNOW
Earth’s upper atmosphere is a sensitive explosion detector
Scientists have detected the ripple effects of small ground-level explosions 100 kilometers up in ionized layers of the upper atmosphere. The result suggests the remote sensing technique could be used to monitor explosive events—natural or human—hundreds of times smaller than before. “It was a big surprise to me,” says Jihye Park, a geodetic scientist at Oregon State University...
World’s largest collection of ancient rock art threatened by Australia’s petrochemical plants
The Murujuga rock art, the world’s largest and oldest collection of petroglyphs, has survived 40,000 years or so out in the open on a finger of land extending from Australia’s northwestern coast. “Murujuga is the most important rock art site in the world,” says Michel Lorblanchet, an archaeologist at CNRS, the French national research agency, who is noted for his work on European...