To travel between solar systems, a spacecraft would need extremely sophisticated – if not impossible – technology.
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When aliens come visiting... AI robots, not real beings, will threaten our existence, scientist says
Harvard professor Avi Loeb believes that aliens are not going to visit Earth in physical form, and would instead send a "technological device guided by AI". Their visit would not be fun either, and ...
Add Yahoo as a preferred source to see more of our stories on Google. The universe is vast and teeming with stars – but if intelligent life exists, it may not be able to visit Earth. NASA, ESA, CSA, ...
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