I first heard of auras when my son was diagnosed with Epilepsy. One of the precursors to a person having a seizure is that they sometimes will see auras right before a seizure. I was very weired out by this but I was told about it by two JW's both who were comparing notes about being epileptic.
Scan to years later and becoming a great user of kinesiology therapy and learning about Chi and body meridians. Chi is the life force, or vital energy within all living things; it flows through channels in your body called meridians. There are twelve principal meridians connected to your internal organs, along which energy constantly flows up and down.
Acupuncture points are located on sections of the meridians that pass close to the surface of the skin. This makes it easy to use acupuncture and acupressure to affect the level of chi flowing to a particular organ to keep it balanced and healthy. Meridians are the pathways of the positive and negative energy power, which carries on some of the communication between the various parts of human beings.
Auras work on the same energy forces that run through our bodies, it makes sense to me that we can learn how to see these auras in fact what I read is that as infants and young children (before school age) we all saw auras and before speech it was one way we recognized our parents.
Some of you asked or talked about the colors of auras and what they mean here is a great site that explains it:
http://www.thiaoouba.com/seeau.htm
I think this is all very interesting. There is so much about our bodies we've not learned and so much we can do on our own with healing and self care it's incredible to me what is out there to learn if you have an open mind and years to learn it!