This is popcorn science taken way too far. He breaks down exactly why popcorn pops—hard hull, moisture, starch, and pressure—then tests a bunch of grains to see what can puff on its own. After that, ...

Add Yahoo as a preferred source to see more of our stories on Google. "Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." I brought Purell, took all four ...