An excerpt from an article in the May 2009 edition of Discover magazine:

“Pinar Letzkus, a vision researcher at Australian National University, rewarded bees with sugar whenever they extended their tongue at the sight of a yellow rectangle on a computer screen. He then fashioned tiny eye patches and put them on a new set of subjects. Bees with their left eye covered learned almost as quickly as did bees without a patch. But bees with their right eye covered did far worse.”

I would like to emphasize the broader implications of this finding: there is a man out there who makes bees watch television, and he can also make bee eye patches.