Smile — for fun and profit

Years ago I gave my last exam before leaving a university to take another position (on a different continent!). A student handed me her exam and gave me a huge, dazzling smile. I felt amazed and wondered where that came from. Part of the dazzling aspect of the smile...

Is giving to others good for you?

To tell which countries have the most generous people, charities created the World Giving Index, which combines responses to samples of people about whether they gave money to a charity, did some free work for a community organization, or helped a stranger in the past...