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[podcast]http://edwardwillett.com/wp-content/uploads//2011/11/Flocking.mp3[/podcast]
It’s a familiar sight this time of year: enormous flocks of snow geese, covering a field, then all taking flight at once, whirling and swirling in unison. It’s almost like they’re all under the control of a single mind, but of course they aren’t. In fact, they’re under the control of a multitude of minds, all of them, literally, bird brains. So how do they move in synchronicity?
Despite years of study, the phenomenon, well-known though it is, has remained a puzzle to researchers. Explanations have included telepathy (no, seriously, that was a suggestion floated in the 1930s). But it appears the actual explanation is more mundane, though ...
Posted by Edward Willett at 13:59, November 3rd, 2011 under Blog, Columns, Science Columns |
Honeybees, particularly in the United States, are in decline.
In 2007-2008, 36 percent of apiaries surveyed by the Apiary Inspectors of America and the U.S. Department of Agriculture reported that some of their colonies had simply...disappeared, a phenomenon known as Colony Collapse Disorder, or CCD.
In
the most recent survey, covering September 2008 to April 2009, 26 percent of the apiaries reported that some of their colonies were lost to CCD, a lower number but still alarming: not just to beekeepers, for whom these kinds of losses are economically unsustainable, but for those of us who like to eat, because bees pollinate 80 percent of fruits and vegetables, and a much as a third of the food we consume relies on ...
Posted by Edward Willett at 12:50, September 30th, 2009 under Blog, Columns, Science Columns |