'Sand' Piles Up Atop Earth's Core
Rising dregs may link the fluid core to its rocky shell
Earth
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Weather Contest Is More Than Hot Air
Winner of long-term forecast gets glory--and $50,000 -
Agreement to Shrink Dead Zone
Billion-dollar plan focuses on Mississippi River drainage -
Iron Tonic Greens Up the Ocean
Blooming ocean supports role for biology in ice age cycles -
Marine Research Dives Into the Unknown
10-year plan advises exploration of unplumbed depths -
Does CO2 Make the Ice Move?
Study suggests that carbon dioxide, not ice sheets, drives the ice ages -
Extinction Hit by Land and by Sea
New evidence tallies the toll of the Permian-Triassic extinction on plant life -
Homegrown Quartz Muddies the Water
Clues to ancient environment may have been misinterpreted -
Big Source of Smog Sniffed Out
Cows took the blame for ammonia, but cars are the bigger culprits -
Bay Area Breathes a Little Easier
"Big one" along Hayward fault is less likely than scientists assumed -
Volcanologists Killed in Blast
Tragedy in Indonesia highlights need for following safety precautions -
New Greenhouse Gas Discovered
Rare human-made molecule traps heat with extreme efficiency -
Ocean Science Urged to Go Deep
National Academy panel backs sea-floor observatories -
Atmosphere Drives Earth's Tipsiness
Mysterious wobble is a product of air pushing the ocean around -
Ocean Floor Wobbles Atop Fluid Layer
Unstable silt could cause landslides, tidal waves -
