Earth
- Earth
Rocks in Earth’s mantle could hold five oceans
Analysis of minerals created in the laboratory under conditions that simulate those deep within the planet suggests that the zone of rocks just outside Earth's core could hold enough water to fill the oceans five times.
- Earth
Zooplankton diet of mercury varies
By modeling a lake ecosystem in large tubs of water, researchers have found that zooplankton—an important link in the food chain—consume much less toxic methylmercury when the lake experiences an algal bloom.
- Earth
A Confluence of Contaminants: Streams’ organic mix may pose environmental risk
The combined effects of at least some of several dozen organic contaminants newly identified in U.S. streams may pose risks to aquatic organisms.
- Earth
Water for the Rock
A long-popular theory about how Earth got wet—that the oceans are puddles left by an ancient rain of comets—doesn't seem to hold water, and new hypotheses suggest that the celestial pantry is now empty of a key ingredient in the recipe for Earth.
- Earth
Underground Soil Economy: Microbes hidden in the dirt react to UV boost
The community of soil microbes may live hidden in the ground, but it still changes when there's more ultraviolet radiation above.
- Earth
When the Mercury Falls: Autumn leaves taint river with poison
Fall foliage that collects in stagnant waterways could release significant doses of a highly toxic form of mercury, which has the potential to accumulate in fish living far downstream.
- Earth
Space Rocks’ Demo Job: Asteroids, not comets, pummeled early Earth
An analysis of trace elements found in a variety of meteorites suggests that most of the heavenly objects that rained hell on the inner solar system about 3.9 billion years ago were asteroids, not comets.
- Earth
Avalanche!
Laboratory studies of how snow crystals change shape under fluctuating environmental conditions and computer analyses that match the patterns of past avalanches with detailed meteorological data are helping scientists uncover the secrets of avalanches.
- Earth
El Niño’s coming! Is that so bad?
Although El Niño is often blamed for ill effects that total billions of dollars, a broader analysis suggests that the United States garners substantial benefits during this weather pattern.
- Earth
Shuttle yields detailed, 3-D atlas
NASA scientists and Defense Department mapmakers are assembling billions of radar measurements made from the space shuttle Endeavour to produce what they say will be the world’s best topographic map.
- Earth
Hard rock jellies: Throng of rare fossils found in Midwest quarry
A Wisconsin sandstone quarry recently served up a rare scientific find nearly a half billion years in the making: fossils of an armada of jellyfish that stud the site’s stone slabs.
- Earth
Old pesticide still makes it to Arctic
Molecules of the pesticides known as chlordanes, which belong to a class of long-lasting organochlorine pollutants, circulate in Arctic air years after they were applied in temperate latitudes.
