A common crop pesticide is making bees dumb
 

Poor honeybees. Back in 2010, the USDA found a possible link between pesticides used to kill varroa mites and colony collapse disorder. Now, researchers from the University of Otago in New Zealand have discovered that they can "suffer severe learning...

http://www.engadget.com/2016/03/02/p...oneybees-dumb/