Neil deGrasse Tyson Answers Your Questions! - Ask the Experts #6. Neil deGrasse Tyson is here to answer your space questions!
Questions:
If light can move at the speed of light because photons have no mass, then how come they can't go faster or, for that matter, escape a black hole?
Why is there always just talk about going into outer space but never any action?
What do you know about multiverses?
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