Word: planet
(lookup in dictionary)
(lookup stats)
Dates: during 1980-1989
Sort By: most recent first
(reverse)
...that it is unlikely to have been accidental," he notes. But other scientists question whether this can be attributed to the greenhouse effect. Stephen Schneider of the National Center for Atmospheric Research in Boulder agrees with Hansen that this has been the warmest decade on record and that the planet is gradually heating up. But the evidence, he says, is circumstantial. Contends Schneider: "It doesn't prove the greenhouse effect...
...classic. Once Director Jim Abrahams (Airplane!) hot-wires the mechanism, the plot takes care of itself, and the movie pretty genially takes care of any audience looking for frenetic summer fun. It's value for money to get two fish-out-of-water stories in one, especially with the planet's two most gifted performing females in the main roles...
...scientists as the stars. Until recently, the earth's core, hidden under thousands of miles of rock, was a mystery. Now all that is changing. In the past two years, thanks to a technological revolution in methods of observation, scientists have begun to paint a theoretical portrait of the planet's interior in startling detail. Says Harvard University Geophysicist Adam Dziewonski: "For the first time we can actually see the inside of the machine...
Describing the core of the earth is no mere academic exercise. Understanding earthquakes, volcanoes and other geological phenomena depends largely on fathoming the forces at work within the planet's mantle, the thick layer of rock that stretches from the core to within an average of 30 miles of the surface. The behavior of the mantle seems to be determined by the core. The molten center also acts as an electromagnetic dynamo, creating the magnetic field that shields earth from the high-energy particles that stream from...
...earth science began in 1981, when scientists learned that planet-wide vibrations resulting from earthquakes deep within the earth are split into a complex system of overlapping "tones." The implication: there is something going on in the core that no one had previously suspected. Recalls John Woodhouse, a colleague of Dziewonski's at Harvard: "It was the beginning of a new wave of attention to the core...