1. Earth

    Where’s the smoke from the N.Y. fires?

    Analyses of smoke from the destroyed World Trade Center towers indicated little risk that the fires would cause significant health effects for cleanup crews and city residents.

  2. Earth

    Dust, the Thermostat

    Analyses suggest that dust has profound, complex, and far-reaching effects on the planet's climate.

  3. Earth

    Quantum physics explains core anomaly

    Scientists have used the principles of quantum physics to answer the long-standing puzzle of why seismic waves travel at different speeds in different directions across Earth's inner core.

  4. Earth

    Himalayas may be due for big temblors

    Scientists say that a narrow region that rims the southern edge of the Tibetan Plateau could be the spawning grounds for large earthquakes that could threaten millions in southern Asia in the decades to come.

  5. Earth

    Dusty workplace may cause change of heart

    Occupational exposure to fine dust can trigger adverse changes in the hearts of even strong, healthy workers.

  6. Earth

    Bt Corn Risk to Monarchs Is ‘Negligible’

    A much-anticipated report states that the most commonly planted forms of genetically engineered Bt corn pose only a "negligible" risk to monarch butterfly populations.

  7. Earth

    Scientists spy sixth undersea-vent ecology

    A new group of hydrothermal vents found in the Indian Ocean are populated by communities of organisms that differ significantly from other such groups of vent systems.

  8. Earth

    Life on the Edge

    Will a mass extinction usher in a world of weeds and pests?

  9. Earth

    Antarctic sediments muddy climate debate

    Ocean-floor sediments drilled from Antarctic regions recently covered by ice shelves suggest that those shelves were much younger than scientists had previously thought.

  10. Earth

    Aircraft spies on health of coral reefs

    Marine ecologists report the development of a new remote-sensing system that can assess the health of coral reefs from planes.

  11. Earth

    L.A. moves, but not in the way expected

    Researchers monitoring small ground motions along faults in Southern California ended up detecting an altogether different phenomenon: the rise and fall of the ground as local governments pump billions of gallons of water into and out of the region's aquifers.

  12. Earth

    Sahara to get hotter, drier, smaller

    By the end of this century, the world's hottest desert will be even hotter, drier, and smaller than it is now, according to an international team of climate modelers.