The Electric Universe theory highlights the importance of electricity throughout the Universe. It is based on the recognition of existing natural electrical phenomena (eg. lightning, St Elmo’s Fire), and the known properties of plasmas (ionized “gases”) which make up 99.999% of the visible universe, and react strongly to electro-magnetic fields. Much of the material considered by the Electric Universe is peer-reviewed, but not all (see Speculative Theories, below).