Earth

  1. Earth

    Oceans’ salinity changed over last half-century

    Warmer atmosphere may be to blame for changes in the water cycle.

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  2. Life

    Bacteria, insects join forces against pesticide

    Microbes in gut, rather than genetic changes, allow insects to develop chemical resistance.

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  3. Earth

    Arctic sea emits methane

    Source of climate-warming gas remains uncertain, but might be microbes.

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  4. Life

    Polar bears older than previously thought

    New analysis reveals that the Arctic species dates back to about 600,000 years ago.

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  5. Earth

    Indonesian quake passes without major tsunami

    A magnitude 8.6 tremor displaced far less water than the 2004 Indian Ocean disaster.

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  6. Humans

    Warming Marches in

    People may argue about why Earth is warming, how long its fever will last and whether any of this warrants immediate corrective action. But whether Earth is warming is no longer open to debate. The National Oceanic and Atmospheric Administration has just published domestic examples to reinforce what Americans witnessed last month — either on TV or in their own backyards.

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  7. Life

    Bat-killing fungus is a European import

    Tracing the origins of the strain that causes white-nose syndrome in U.S. animals to Europe, scientists show that infection ups arousal rate during hibernation, depleting energy stores.

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  8. Humans

    Bat killer is still spreading

    Since 2006, some 6 million to 7 million North American bats have succumbed to white-nose syndrome, a virulent fungal disease. That figure, issued in January by the U.S. Fish & Wildlife Service, at least sextupled the former estimate that biologists had been touting. But the sharp jump in the cumulative death toll isn’t the only disturbing new development. On April 2, scientists confirmed that white-nose fungus has apparently struck bats hibernating in two small Missouri caves. The first signs of clinical disease have also just emerged in Europe.

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  9. Earth

    Stop-and-go plate tectonics

    Early on, ancient crustal plates may have dived deep into the Earth, time and again, giving a halting start to the planetary remodeling process.

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  10. Humans

    Yet another study links insecticide to bee losses

    Since 2006, honeybee populations across North America have been hammered by catastrophic losses. Although this pandemic has a name — colony collapse disorder, or CCD — its cause has remained open to speculation. New experiments now strengthen the case for pesticide poisoning as a likely contributor.

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  11. Humans

    Weighing the costs of conferencing

    A provocative editorial in the Journal of the American Medical Association questions the value of attending scientific conferences. It’s a theme that reemerges every few years. And in times of tight budgets, the idea seems worth revisiting.

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  12. Life

    Pesticide-dosed bees lose future royalty, way home

    Unusual field tests reveal how common insecticides, even at nonfatal doses, can erode colonies and threaten the future of bumblebees and honeybees.

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