Dental plaque is a complex biofilm at the heart of oral disease. Learn how it causes cavities and gum inflammation and why ...

If you really want to appreciate America, leave. That’s right. Get out. Go somewhere you’ve never been for two weeks.

Bad breath can knock your confidence, especially because it’s easier for other people to notice than yourself. So being aware ...

Learning about those kinds of negative things while traveling in another country makes you extra-grateful you’re an American. So does paying $7.68 for a gallon of gasoline in Italy or Spain, which ...

People in affluent countries around the world are willing to tax themselves to address climate change and ease poverty.

Traveling in the United States — especially by car — is the best way to understand how free America is, how big and beautiful ...