1. Earth

    Farmers could help heal Gulf of Mexico

    Farm-derived nutrients in the Mississippi River that create a huge dead zone in the Gulf of Mexico could probably be substantially reduced if farmers simply used a little less fertilizer.

  2. Earth

    Uranium recorded in high-altitude ice

    An international team of scientists has analyzed a lengthy core of ice and snow drilled from atop Europe's tallest mountain to produce the first century-long record of uranium concentrations in a high-altitude environment.

  3. Earth

    Grape-harvest dates hold climate clues

    The vintner's habit of picking no grapes before their time may give scientists a tool that could help verify reconstructions of European climate for the past 500 years.

  4. Earth

    Bottled Water for All?

  5. Earth

    Researchers confirm sea change in oceans

    A new analysis of ancient seawater shows that the ocean's chemistry has fluctuated over the last half-billion years.

  6. Earth

    How polluted is a preschooler’s world?

    Preliminary data from a new study show that children may ingest traces of atrazine, a common herbicide, in their drinking water.

  7. Earth

    Kitchen tap may offer drugs and more

    Excreted drugs and household chemicals are making their way through community waste-treatment and drinking-water plants.

  8. Earth

    Composting cuts manure’s toxic legacy

    Composting manure reduces its testosterone and estrogen concentrations, limiting the runoff of these hormones, which can harm wildlife.

  9. Earth

    Photo Treasures

  10. Earth

    Lowland tree loss threatens cloud forests

    Changes in regional climate brought about by large-scale deforestation in the eastern lowlands of Central America are affecting weather in the mountains downwind, imperiling ecosystems there.

  11. Earth

    Ill Winds

    Research suggests that the long-range movement of dust can sicken wildlife, crops—even humans—a continent away.

  12. Earth

    Rain of foreign dust fuels red tides

    Soil particles from Africa, raining out from clouds over the Americas, may trigger the first steps that lead to toxic red-tide algal blooms off Florida.