Earth
- Earth
Arctic sea emits methane
Source of climate-warming gas remains uncertain, but might be microbes.
- Life
Polar bears older than previously thought
New analysis reveals that the Arctic species dates back to about 600,000 years ago.
- Earth
Indonesian quake passes without major tsunami
A magnitude 8.6 tremor displaced far less water than the 2004 Indian Ocean disaster.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- Life
Fossils show signs of earliest burrowing
Worms’ seafloor tunneling more than a half-billion years ago could have stirred up evolutionary forces.
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