Most people you speak to now, will know someone who has done yoga in their lives. In yoga, they teach you about your wheels of energy throughout you, your Chakra points in your body. These wheels of light regulate the etheric energy of our biosphere and we can experience ourselves at our peak potential when the flow is easy from one to another or we can experience illness and ailments due to blockages. It is surprising how little people know about this. If applied correctly and having a good understanding can mean it will be a sensation in your life.
There has been quite a lot of research in this area for millennia and modern day scientists can now photograph this etheric side of your physical body.