What is the hidden power of a smile?

TED?

Some of you may be familiar with TED. TED? TED's mission is to "TED is a nonprofit Devoted to spreading ideas, Usually in the form of short, powerful talks (18 minutes or less)." Originally, they were conferences about technology, design and entertainment. Currently, these talks cover almost all topics, whether business, sciences, ... it's definitely an incredible source of inspiration and learning, a genuine spirit openness.