Where did it originate?
Reiki might be trendy but it isn't anything new. In fact, it was developed in Japan in 1922 by Mikao Usui, and it was later expanded to other places by Hawayo Takata. Since then, its popularity has grown immensely and according to a survey conducted in 2007 over 1.2 million US adults and 161,000 children have experienced at least one session. And yes, even scientists have shown some support for it!
[Photo via @kristen.elise89]