Enormous satellite dishes make up the search party for extraterrestrial life, but in the event of success, should a welcome party follow? Astronomers and biologists involved in the search for life on other planets are worried about a lack of regulatory and ethical policies to guide them.

“No government has plans” for what to do in the event of the discovery of intelligent extraterrestrial life, says astrophysicist Martin Dominik of the University of St Andrews, UK, who organized a conference at the Royal Society in London that began today

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