Scientists Discover the Origin of Swiss Cheese's Holes

Sandwich lovers around the world will forever remember 2015 as the year scientists solved the great Swiss cheese mystery. After nearly a century of research, scientists in Switzerland — of course — have finally discovered why Swiss cheese has holes, and it has nothing to do with hungry mice. Rather, it's tiny flecks of hay that fall into the milk during production that give Swiss cheese its distinctive appearance, according to experts from Agroscope, a governmental agriculture research gr