the faster you move, the slower time goes

you conduct two experiments. In the first, the light source is now being propelled away from you at a speed of 300 million miles per hour.

 In the second, the light source is moving towards you at the same speed. Each time you measure the speed of the light, however, the number is the same: 671 million miles per hour.

What does this mean? Well, for one, it stretches time: the faster you move, the slower time goes. Yes, this is as wild as it sounds. The truth is so much stranger than fiction