[![Radio dishes are pointed skyward at the Australian Telescope Compact Array at the Paul Wild Observatory. Today, radio astronomy is the focus of the search for extraterrestrial intelligence, or SETI. But that may not always be the case.]]So what happens if SETI find a signal from E.T. ? Do we reply? Experts are already arguing over those questions. British UFO investigator Nick Pope looks at the issue of what happens after contact.
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