Earth

  1. Earth

    Dioxin-type carcinogens pose additive risks

    Pollutants known as dioxins, furans, and certain chemically related polychlorinated biphenyls have additive cancer-causing effects when mixed together, as has been assumed in calculating the chemicals' health risks.

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  2. Earth

    Chalk reveals greatest underwater landslide

    Seismic waves generated by an extraterrestrial object crashing into Mexico 65 million years ago appear to have sent sediment from shallow waters sliding off the continental shelf.

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  3. Agriculture

    Learning from Studs

    Livestock gene banks offer dividends to researchers hoping to milk higher profits out of dairying.

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  4. Earth

    Life Landed 2.6 Billion Years Ago

    Unusually carbon-rich rocks found in eastern South Africa may push back the evidence of life on land to 2.6 billion years ago, more than twice the current age of indisputably terrestrial organisms.

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  5. Earth

    Change in the Weather? Wind farms might affect local climates

    Large groups of power-generating windmills could increase wind speed, temperature, and ground-level evaporation, thereby influencing a region's climate.

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  6. Earth

    Extra rainfall may stem warming in Midwest

    Increased precipitation in parts of the Midwest may reduce the temperature increases expected to occur in the next few decades as a result of global warming.

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  7. Earth

    Eye on Mount St. Helens

    Keep an eye on the ongoing volcanic activity at Mount St. Helens in the state of Washington. Images taken by the Johnston Ridge Observatory’s VolcanoCam, at an elevation of about 4,500 feet, are updated roughly every 5 minutes. They’re snapped from a distance of about 5 miles from the volcano, looking approximately south-southeast across the […]

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  8. Earth

    Global warming won’t boost carbon storage in tundra

    The notion that a warmer climate in arctic regions will lead to enhanced carbon sequestration in tundra ecosystems isn't supported by field data.

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  9. Earth

    Humming Along: Ocean waves may cause global seismic noise

    The slow and nearly constant vibrations of Earth's crust stem from severe winter weather over some of the world's oceans.

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  10. Earth

    Deep Squeeze: Experiments point to methane in Earth’s mantle

    Although today's fossil fuel reserves reside in Earth's crust, a new study suggests that hydrocarbon fuel might also nestle deep in the mantle, at depths of 100 kilometers or more.

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  11. Earth

    Cool Harvest: Frost on sea ice may boost atmosphere’s bromine

    Frost flowers, the delicate crystals that sometimes grow atop fresh sea ice, can be a substantial source of ozone-destroying bromine in lower atmosphere near the poles.

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  12. Earth

    No Deep Breathing: Air pollution impedes lung development

    Spending one's childhood in a community with polluted air stalls lung development roughly as much as does having a mother who smokes.

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