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11 February 2014
The polar vortex made large parts of the country miserable this year with freezing cold air. But, in the Arctic, air temperatures were above average, sea ice grew slower than average, and the yearly ice cover continues thinning into sheets that break up in the summer. This shift is altering the chemistry of the air over the Arctic, and may affect the climate in ways that scientists don’t yet understand.
18 December 2013
An 8.0-magnitude earthquake struck 70 kilometers west of Santa Cruz Island in the Solomon Islands Feb. 6. It triggered a tsunami that swept through tribal towns and wooden huts along a 20-kilometer stretch of coastline.
17 December 2013
A local legend circulates in the Upper Neckar Valley in southeast Germany. It tells of a worker, a healthy, strong young man, who lay down one day beside the railroad tracks for a midday nap. The man never woke up, prompting speculation about his death that endures until today.
16 December 2013
Melting ice caps may not be the only problem the Arctic has to worry about as the climate changes. As temperatures rise, permafrost melts earlier and stays wet longer. When plants and other organic material in the soil thaw, they decompose, releasing huge quantities of methane and carbon dioxide.
13 December 2013
New data from ocean microbes in the Soledad basin off the coast of Baja, Calif., confirms a La Niña-like effect cooled surface waters 4,000 to 10,000 years ago.
Wally the robot crawls along the ocean floor, watching the bubbles. And 8,000 miles away, a German scientist sits on a couch with a laptop, watching with him.
Cassette tapes or eight-tracks might be the first things that come to mind when thinking about dated magnetic storage, but Bronze Age clay pottery has them both beat. Using information stored in the clay’s magnetic minerals, scientists are developing methods to determine how old these artifacts are when other dating methods come up short.
12 December 2013
Long before the dinosaurs died off, the “Great Dying” killed nearly all life in the ocean, 70 percent of terrestrial animals and even insects. But this mass extinction more than 250 million years ago – Earth’s greatest natural disaster – is still a scientific mystery. Little evidence remains of why and when life on the planet crashed to this long pause.
In 1988, scientists at the Tennessee Oak Ridge National Environmental Research Park planted a scattering of Sweetgum seedlings to fill a space equivalent to a running track. Nearly 10 years later, after the trees had matured, construction crews plopped four rings of 40-foot PVC pipes into the floor of the new deciduous forest. In 1998, two sets of pipes switched on and began blowing carbon dioxide into the trees’ air supply, non-stop for 12 years.
A new way to identify areas at risk for landslides will help countries avoid tragedies like super-typhoon Bopha. The storm slammed into the Philippines in 2012, killing 1,200 people and causing $1 billion in damage. Scientists from the University of the Philippines are using lasers and radar to identify alluvial fans: sediment deposits resulting from streams or debris flows. Debris flows are landslides with rocks and dirt wet enough to …