The universe is vast and teeming with stars – but if intelligent life exists, it may not be able to visit Earth.
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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What should you do if you meet an alien? Neil deGrasse Tyson in 'Take Me to Your Leader' (interview)
Delivering a refreshing fusion of science, pop culture, history, and esoteric humor, renowned astrophysicist, lecturer, and best selling author Neil deGrasse Tyson takes us on a whirlwind tour of UFO ...
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