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

Fact No. 1: Smiling has body benefits.
Every time you frown, you’re unnecessarily exhausting 43 facial muscles, while smiling only uses 17 muscles. Some studies show that beaming can benefit your blood pressure levels. Add a laugh and you’ll also slim your middle — the movement exercises your abs, diaphragm, shoulders and heart. Scientists at Vanderbilt University found that laughing can stoke your calorie burn by up to 20 percent.

Fact No. 2: Grinning is human.
One thing that separates us from animals may be our ability to accessorize, but it’s also our capacity to smile. We don’t learn how to smile from our surroundings; rather, it’s a natural mechanism that’s hardwired in us from birth. Studies have shown that newborn babies crack their first grin as early as two hours after delivery.

Fact No. 3: Women are more likely to smile.
Fact: The average woman smiles approximately 62 times a day. In that same day, a man only flashes his pearly whites a mere eight times. Interestingly enough, a study at Yale University found that the difference declines when the two genders share the same occupation. Why? The researchers believe that it could be because every workplace has an unspoken “smiling standard” that’s followed by all employees.

Fact No. 4: There are different types of smiles.
Happiness isn’t the only thing we can express when we turn up the corners of our mouths. During his research at the University of California, San Francisco, scientist Paul Ekman discovered that people smile 19 different ways, depending on social situations and emotions, including fear, grief and hatred. All types fall under two larger categories: heartfelt and artificial. You can differentiate the two: Sincere smiles cause the corners of your eyes to scrunch up — insincere smiles don’t.

Fact No. 5: Beauty comes from a smile.
When asked to select more attractive counterparts, study participants at Scotland’s University of Aberdeen pointed to those people who were beaming. In another recent lab report, 69 percent of those asked said that women look younger and more attractive when they wear a smile rather than makeup.

Fact No. 6: Smiling leads to a longer life.
Research conducted at the University of Illinois has suggested that people who generally feel happy and smile more often have a longer life expectancy of nearly a decade. Another study looked at baseball cards. The Wayne State University scientists concluded that those athletes who were flashing their pearly whites in their pictures lived on average seven years longer than those who didn’t.

Fact No. 7: Healthy marriage from a happy smile.
People who grin consistently are more likely to have healthy marriages, say researchers at DePauw University in Indiana. Some say it’s because smilers can more easily express their emotions, and others think that people who smile often attract happier people, allowing them to form stronger, more positive connections.

Fact No. 8: Smiling releases endorphins.
Research shows that the simple act of turning your mouth up, whether authentic or not, can help release endorphins, feel-good hormones. Serotonin, a chemical that’s a natural stress-reducer, is also increased when you smile.

Fact No. 9: Fight a cold with a grin.
Cut down on those sick days by plastering a big, cheesy grin on your face. Every time you flash your teeth, your body produces greater quantities of antibodies and T-cells (or white blood cells), which may give your immune system a huge power boost.

Fact No. 10: Smiling is contagious.
During an experiment conducted in Sweden, participants reported that they found it very difficult to frown when they saw other participants who were smiling. Many began to turn their mouths up without even realizing it. Start smiling and the whole world will smile with you.

(This was taken from Bright Smile Beautiful You‘s website.)

When I was around 5, I used to think that celebrities were selfish because they earned crazy amounts of money, but didn’t help all the starving people around the world. Since then, I have been proven wrong! There are many celebrities out there trying to make a change, and to them I’d just like to say “Thank-you”. They inspire me to keep doing what I do (not that you know what I do, do you?)

One of these amazing celebrities is Ian Somerhalder. I fell in love with Ian Somerhalder when I first saw him on Lost. It was something about his eyes… He was then semi-re-resurrected as a vampire on The Vampire Diaries as Damon Salvatore, the “Dreamy Bad Boy Vamp”. I’ve been stalking him (from a safe distance, so it’s not like he’ll ever catch me in the process) on twitter, and he recently had an interview with three girls in Miami. This interview was to raise awareness about environmental issues around the world, as well as Ian Somerhalder’s own foundation that’s going to help animals, the environment, and many other things.

The best thing about celebrities who care about the environment is that they both have the resources to help the environment, as well as a group of fans who would learn and follow what they do. I am truly impressed by how down-to-earth Ian Somerhalder is, and how passionate he is about saving the earth. If you follow his twitter account, you will see what I mean.

Here is the first part of the interview.