All Stories by Sid Perkins
- Humans
Talent Search: Student finalists’ flair for science to be rewarded
A panel of judges announced the 40 finalists in the 61st annual Intel Science Talent Search.
- Earth
It’s a Rough World
Scientists are using fractals, mathematical forms that can describe objects with fractional dimensions, to model phenomena such as wildfire propagation and the spread of toxic fluids through rocks and soil.
- Humans
Official chooses Nevada for nuclear waste
On Jan. 10, Energy Secretary Spencer Abraham notified Nevada's Governor Kenny Guinn by telephone that he intends to recommend that southwestern Nevada's Yucca Mountain site serve as the nation's long-term geological depository for high-level nuclear waste.
- Earth
Earth’s inner core could include silicon
Laboratory experiments investigating the crystal structure of iron-silicon alloys at high temperatures and pressures may yield new insights into the mineral composition of Earth's core.
- Earth
Finding fault for an old earthquake
Scientists in Southern California believe they've found evidence that finally identifies the source of one of the region's largest quakes, a magnitude 7-plus temblor that struck the area on Dec. 21, 1812.
- Earth
Satellites could help track sea level
Experiments that used signals from Global Positioning System satellites to precisely measure altitude above a lake's surface may pave the way for fleets of spaceborne sensors that can quickly and inexpensively monitor local and global changes in sea level.
- Earth
Bolts from the blue can have long reach
Current U.S. Air Force operating procedures recommend personnel stop working outdoors when lightning is spotted within 5 nautical miles, but a new analysis suggests that this distance may not be adequate to fully protect aircraft and ground crews.
- Earth
Southeastern Alaska is on the rebound
Scientists using the Global Positioning System to track ground movement along faults in southeastern Alaska have measured something entirely different—the rapid rise of parts of the region due to the recent melting of glaciers.
- Earth
Global warming to boost cotton yields
The increase of carbon dioxide expected in the coming decades may boost cotton yields up to 26 percent, new models predict.
- Earth
Toxic metals taint ancient dust
A new study of dust lofted to Antarctica suggests that excess amounts of trace metals coated dust grains long before human industrial activity began loading the atmosphere with pollutants.
- Earth
Turbulence leads to early rain of ash
A new aerodynamic analysis suggests that chaotic turbulence in a high-altitude cloud of volcanic ash can cause small particles of the ash to clump together and fall to the ground much closer to the volcano than expected.
- Earth
It’s bottoms up for iron at sea’s surface
Sediments drilled from the seafloor off Antarctica suggest that the dissolved iron in surface waters that fuels much of the region's biological productivity comes from upwelling deep water currents, not from dust blowing off the continents.
