Burn calories with laughing

Most likely, the last thing you think about when you’re posing for your latest Facebook shot is the science behind your smile. But there’s a lot more to a smile than meets the eye. Here are 10 little-known facts that will have you beaming.

1. Smiling has body benefits.
2. Grinning is human.
3. Women are more likely to smile.

To read the other seven facts, and explanations for all, visit completelyyou.com.