Earth

  1. Earth

    Sea Change: Carbon dioxide imperils marine ecosystems

    Almost half the carbon dioxide produced by human activity in the past 2 centuries is now dissolved in the oceans, resulting in chemical changes that, if unchecked, could threaten some marine ecosystems.

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  2. Earth

    Bacteria found to release arsenic into groundwater

    Arsenic gets into groundwater largely through the action of bacteria residing in aquifer sediments.

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  3. Earth

    Treaty enacted to preserve crop biodiversity

    The United Nations enacted a new international treaty to halt the erosion of genetic diversity of crops.

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  4. Earth

    City Heat: Urban areas’ warmth affects plant growth

    Satellite observations of eastern North America show that plants in and around urban areas bud earlier in the spring and retain their foliage later in the fall than do plants in nearby rural settings.

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  5. Agriculture

    Plastic vs. Plants: Mulch method changes tomato’s gene activity

    A suite of at least 10 genes in a tomato plant behaves differently depending on the farmer's mulch-and-fertilizer routine.

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  6. Earth

    Just a Tad Is Too Much: Less is worse for tadpoles exposed to chemicals

    The herbicide atrazine is more likely to kill developing amphibians when it is highly diluted than when it's much more concentrated in aquatic environments.

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  7. Earth

    Warmer climate, decreased rice yield

    Agricultural data gathered over a dozen years at a Philippines rice paddy suggest that climate changes brought about by global warming could significantly diminish rice yields.

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  8. Agriculture

    A Maize-ing Travels

    Corn, an American native, has taken root the world over and is becoming increasingly important to agriculture in nations beyond the West.

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  9. Earth

    Sky Lights

    Devoted to atmospheric optics, this Web site offers beautifully illustrated explanations of spectacular phenomena ranging from rainbows to ice haloes. Created by physicist Les Cowley, it features amazing images, along with explanations of how the imaged effects were created by nature. The ice halo section offers downloadable software for simulating various types of halos. Go […]

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  10. Earth

    Sprawl’s aquatic pollution

    A new study links the traffic associated with urban sprawl to an unexpectedly large rain of air pollutants entering local waters.

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  11. Earth

    New database describes all the marbles

    Analyses of the isotope ratios of carbon and oxygen in hundreds of samples of Greek marble may help researchers identify the quarries that supplied the stone for some of Europe's most famous statues and architecture.

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  12. Earth

    Dead Heat

    New studies suggest that adverse health effects related to global warming aren't just a theoretical concern for the distant future.

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