Well, yeah, anti-matter is not negative matter, it's more like mirror-matter. Negative energy and negative matter probably doesn't exist in our universe. Negati

Well, yeah, anti-matter is not negative matter, it's more like mirror-matter. Negative energy and negative matter probably doesn't exist in our universe. Negative matter would require an anti-photon that could in theory cause energy to be destroyed if it interacted with a regular photon. There are four types of matter, of which two are theoretical: positive-matter, positive-anti-matter, negative-matter, negative-anti-matter. Only the first two exist in our universe as far as we know.