Earth

  1. Earth

    Dust devils produce magnetic fields

    Scientists who chase dust devils report that the tiny twisters can produce a small magnetic field that changes magnitude between 3 and 30 times per second.

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  2. Earth

    Enjoy the beach. . .while it’s still there

    Up to a quarter of the structures within 500 feet of America's coastlines may be lost to erosion in the next 60 years, according to a report issued by the Federal Emergency Management Agency last week.

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  3. Earth

    Putting Whales to Work: Cetaceans provide cheap labor in the icy deep

    Whales equipped with environmental sensors discover warm water beneath Arctic ice.

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  4. Earth

    Kilauea: 20 years on, it’s still erupting

    As of Jan. 3, Kilauea—Hawaii’s Energizer Bunny of volcanic activity—has been erupting continuously for two decades.

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  5. Earth

    Electronic Jetsam

    Oceanographers are developing and deploying a variety of seafaring probes—including drifters, gliders, and scientific torpedoes—that will enable them to explore and monitor the ocean remotely.

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  6. Earth

    Why the Mercury Falls

    Certain pollutants can foster the localized fallout of mercury, a toxic heavy metal, from the atmosphere.

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  7. Agriculture

    Carnivorous fish nibble at farming gain

    Fish farming may ease pressure on wild stocks overall, but for certain species, farms mean a net loss of fish.

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  8. Earth

    Estrogens classified as carcinogens

    The sex hormones known as steroidal estrogens, which are used in hormone-replacement therapies and birth control pills, have joined a government list of known human carcinogens.

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  9. Earth

    Contraceptive ring could pose risks after its disposal

    Discarded vaginal contraceptive rings could interfere with fishes' reproduction by releasing estrogen into streams.

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  10. Earth

    Snow alga may be sizable carbon sink

    A common microorganism that adds a reddish tinge to some patches of snow may be a significant consumer of planet-warming carbon dioxide.

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  11. Earth

    Earth Art

    Brilliant, colorful patches of Earth, as seen in photographs snapped by the Landsat-7 satellite, can look like the work of abstract artists. A number of these beautiful, high-resolution images have now been assembled into an online gallery depicting “Our Earth as Art.” Go to: http://landsat.gsfc.nasa.gov/earthasart/

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  12. Earth

    The Case for DDT

    What do you do when a dreaded environmental pollutant saves lives?

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