@engineering.tube8: Imagine two identical stopwatches. Leave one on your desk. Strap the other to a rocket going 90% the speed of light. When the rocket comes back, the clocks won't match. The moving one will be behind. That's time dilation. Your speed through space affects your speed through time. GPS satellites actually have to correct for this every day, or your maps would be miles off! Physics is wild. #TimeDilation #HendrikLorentz #Einstein #ScienceIsCool #Relativity