To travel between solar systems, a spacecraft would need extremely sophisticated – if not impossible – technology.
Barack Obama's insisting the USA doesn't have little green men or alien spaceships locked up in an underground bunker somewhere ... but, if they ever visit Earth, he's volunteering to lead the ...
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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 ...
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What should you do if you meet an alien? Neil deGrasse Tyson in 'Take Me To Your Leader' (interview)
In a world easily startled by sensationalism, Tyson offers a cool, gentle voice of reason amid the unchecked fascination with alien visitation.
As the Pentagon throws open its extra-terrestrial files, Disclosure Day depicts encounters of an even closer kind.
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