[Puzzleblogger Kevan Choset, March 31, 2006 at 10:56am] Trackbacks

In 1998 Burger King introduced the left-handed Whopper (the condiments were designed to fall out the right side). In 1965 the BBC conducted a trial of "Smell-o-vision," in which smells would be conducted to viewers (smellers?) at home. And several years ago BMW introduced a car horn designed to calm, rather than aggravate, other drivers.

What do these events have in common?