Is time travel possible?

One of the most prevalent sci-fi tropes, the idea of time travel is a fascinating concept to imagine. But do the laws of physics allow for such a feat? Brian Greene explains.

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[lbjorakbyrawy]

If it is all about speed to change time and some scientists believe that speed is a matter just like waves and it is inversely proportional with gravity...so what if we invented a machine that gravity is too strong in (magnets) so speed slows down times goes faster and bufff your in future ?

[hgqujqf]

I think this is dump.When you run in high speed you Will come earlier, not later

[sorellman]

Who's this joker? He does not even understand the concept of time travel.