Mankind longs for proof that we are not alone in the universe, but the moment of first contact will certainly mean the end of the world as we know it. Whether that is a bad thing for humanity or the start of a great future is uncertain.
Michio Kaku says,"Electromagnetic radiation is the fastest, most effective way to communicate between stars."
An ion engine is based on the repulsion of like charges to create thrust; the Dawn spacecraft was launched by NASA using the principle of ion thruster. The closest star (other than the Sun), Proxima Centauri, is about 25 trillion miles away.
Paul Davis thinks that junk DNA is the "perfect hiding place" (as Morgan Freeman puts it) for a coded message from alien creatures if they exist.
Mike Callahan has looked at carbonaceous chondrites (space rocks).
1. Interviewed experts: Charles S. Cockell, Michio Kaku, Laurance Doyle, John Brophy at Jet Propulsion Laboratory, James Kakalios, Paul Davies, Mike Callahan.
2. Featured musicians: ArcAttack band members play music using Tesla coils.
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