I took physics my junior year of HS. If you went faster the speed of light you wouldnt age, time would ceast to exist. So for instance you had children and went the speed of light long enough you could come back and your children would be older than you.... BTW I had the coolest physics teacher. He laid on a bed on nails and had two students stand on him. He made a rocket propelled tennis ball launcher. He lit himself on fire. I think he did more cool stuff but I am drawing a blank its been awhile