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Searching In features, blog entries, column entries & news items, Under the topic Earth
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Measurements with a magnetometer aboard the NEAR-Shoemaker spacecraft a few days after it landed on the asteroid 433 Eros confirmed a major puzzle: The rock has no detectable magnetic field. (p. 341)Published: June 2nd, 2001; Vol.159 #22Found in: Planetary Science
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A tiny fossil skull found in 195-million-year-old Chinese sediments provides evidence that crucial features of mammal anatomy evolved more than 45 million years earlier than previously thought. (p. 324)Published: May 26th, 2001; Vol.159 #21Found in: Paleobiology -
Chunks of fossil charcoal found in ancient sediments in north central Pennsylvania suggest that cycles of wildfire plagued Earth more than 360 million years ago. (p. 309)Published: May 19th, 2001; Vol.159 #20Found in: Earth Science -
Computer models show that the onset and strengthening of Asian monsoons over the past 8 million to 9 million years are strongly linked to various stages in the uplift of the Tibetan plateau. (p. 301)Published: May 12th, 2001; Vol.159 #19Found in: Earth Science
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Residents of the Pacific Northwest escaped the wrath of a magnitude 6.7 earthquake in the summer of 1999 because the ground movement of 20 centimeters along a deep fault occurred over a period of 6 to 15 days, not all at once. (p. 301)Published: May 12th, 2001; Vol.159 #19Found in: Earth Science
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A variety of filamentary structures on the fossil of a small theropod dinosaur recently found in China may provide new insight into the evolution of feathers. (p. 262)Published: April 28th, 2001; Vol.159 #17Found in: Paleobiology
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Construction of the Three Gorges Dam across the Yangtze River in China may lead to warmer temperatures in Japan, because any diversion of water for Chinese agriculture could initiate convection in the Japan Sea that brings warmer water to the surface. (p. 245)Published: April 21st, 2001; Vol.159 #16Found in: Earth Science -
A distinctive organic chemical related to substances produced by modern flowering plants has been found in ancient fossil-bearing sediments, possibly helping to identify the ancestral plants that gave rise to flowers. (p. 253)Published: April 21st, 2001; Vol.159 #16Found in: Paleobiology
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A supposed missing link between dinosaurs and birds that was first unveiled in 1999, and revealed to be a forgery soon thereafter, was actually cobbled together from parts of animals from two new species. (p. 253)Published: April 21st, 2001; Vol.159 #16Found in: Paleobiology
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New observations of the middle and upper atmosphere over Earth's polar regions may require scientists to revamp their mathematical models of temperature and other environmental conditions at high altitudes. (p. 215)Published: April 7th, 2001; Vol.159 #14Found in: Earth Science -
Scientists have found microorganisms within Kentucky shale that are eating the ancient carbon locked within the rock, a previously unrecognized dietary habit that could have a prevalent role in the weathering and erosion of similar sedimentary rock at many other locations. (p. 198)Published: March 31st, 2001; Vol.159 #13Found in: Earth Science
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Using tree-ring analysis, an international team of researchers has reconstructed the earliest record of annual climate variation. (p. 197)Published: March 31st, 2001; Vol.159 #13Found in: Earth Science
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Scuffs, scrapes, and gouges found atop undersea plateaus and ridges in the Arctic Ocean suggest that kilometer-thick ice shelves covered much of the ocean there during some previous ice ages. (p. 181)Published: March 24th, 2001; Vol.159 #12Found in: Earth Science
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Evidence from 65-million-year-old sediments suggests that a single impact from space wiped out the dinosaurs and that ecosystems recovered from the trauma in only a few thousand years. (p. 189)Published: March 24th, 2001; Vol.159 #12Found in: Earth Science
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The Asian mountain range that includes some of the tallest peaks in the world turns out to be about 15 million years younger than geologists previously thought. (p. 189)Published: March 24th, 2001; Vol.159 #12Found in: Earth Science
