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Dan Werthimer, Chief SETI Scientist at the UC Berkeley Department of Astronomy
Dan Werthhimer: I think people should start thinking about the consequences of communicating with other civilizations. There are potentially great outcomes: We could learn a lot, and there are potentially bad outcomes. We could learn about technologies that would be good for weapons, or something like that. So it would be good to start thinking about how the world is going to deal with this and who should speak for Earth—and if we should reply, who's going to reply, and how do we draft that sort of message. It's good to think about that ahead of time, because it could be chaos if we ever find a signal.Is one major candidate better in your opinion?
I think [Donald Trump] makes a lot of off-the-cuff remarks, many of which he later says, "Oh that was a joke," but that's the kind of thing that could get us in a war, or a nuclear war or something. Especially when you're coming into contact with different cultures, or even different civilizations, you need to be careful about what you say, and how it could be misconstrued. We need to go about these things much more carefully than Trump does with that stuff.What could go wrong if Trump is in office and aliens show up?
It's likely the first civilization we contact will be way more advanced than we are. We cannot contact them now if they're primitive civilizations—or if they're still bacteria or trees. It's unlikely that we'll discover a civilization that's just discovered radio like we have—we've only had radio for 100 years. The more likely scenario is we discover civilizations that are billions of years old that have been talking to one another. You get on the galactic internet and learn about the thousands of other civilizations that can talk to one another—or billions. Our sun is 5 billion years old, and some stars are 10 billion years old. So you can imagine very advanced civilizations.
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Andrew Siemion, Director of the Berkeley SETI Research Center
Andrew Siemion: I think imagining what might happen if a civilization were to visit Earth would be difficult to predict, and I think all the declared candidates have their pros and cons. I don't know that I would venture a particular person on a declared ticket to be my favorite. Suffice to say that they all have pros and cons, depending what another civilization might be like.But what do you know about the candidates on this issue?
I do know that Hillary has expressed some interest in the topic, and that's very heartening. But I think, again, it's very difficult to predict what another civilization might be like. And it's hard to predict what kind of leader would be best suited to deal with such a situation—but my hope would be that were we to actually make contact with another civilization that it would be a unifying moment for the whole world. Not just for the United States, but for the whole world, and we could all come together to address that challenge, or revel in that discovery, whether we're Democrats or Republicans or other.
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It's very difficult to predict what another intelligent species in the galaxy, or indeed in the universe, might be like. Some people think technological developments and altruism are kind of tied together, and the more technologically advanced a species becomes the more altruistic or friendly it becomes. We don't really have any good evidence for that. In fact, we kind of have evidence to the contrary. So it's really hard for us to predict what another civilization might be like. At SETI, we're just trying to listen for signals. We're not expressly trying to make contact per se, at least overtly.
Preston Dennett, UFO Investigator and Author
Preston Dennett: Ha! That's an interesting question. I would pick Hillary because she's had more foreign policy experience. She has also been photographed carrying a book about UFOs, and her husband has read UFOs Over Roswell, so I'm guessing she knows about UFOs.
Paul Horowitz, Experimental Astrophysics at Harvard
Paul Horowitz: That's such a no-brainer!Why?
Well, I'd want one, someone of statesman-like, upstanding character—like Walter Cronkite, or [Barack] Obama, or Colin Powell, or Gandhi—and two, someone who would seek the counsel and accumulated wisdom of social scientists, historians, linguists, and astronomers. Clearly, one [candidate] fails spectacularly at both. Some may argue that the other, though she would do nicely on number two, does not really satisfy number one. Without stating my opinion on that—and given your constraint that it has to be a choice [between existing candidates]—it's obvious.Follow Mike Pearl on Twitter.