Plasma, created in a lab by heating gas, constitutes the fourth state of matter.
Learn about gravity, stars, and really big lumps on this Moment of Science.
Why don't tooth-brushing and mouthwash really help? Why makes garlic so persistently stinky?
Say you're walking down a city street, minding your own business, when you approach a manhole...
Garlic-lovers, and the unfortunate people who love them, are well aware of the reeking breath that’s caused by the tiniest bit of garlic. So why don’t products like toothpaste and mouthwash help lessen the stench? What makes garlic so persistently stinky?