Jill Tarter, who is stepping down as director of the SETI Institute, has taken issue with Hollywood's depiction of aliens as aggressive, bloodthirsty invaders. She says any aliens that reach Earth will come strictly as explorers.
Sir Stephen Hawking, on the other hand, warns thay aliens coming to Earth will be aggressive, possibly here to strip mine our planet of its resources.
Two competent, experienced scientists coming to diametrically opposed conclusions. Who's right? Maybe both. Seeing all alien races capable of interstellar travel as the same is almost certainly a mistake. Diversity is the calling card of the cosmos. Or maybe they're both wrong. Alien races may have motivations that are, well. alien to us. Determining why ET acts will have to wait until we can study ET in action.
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