Time is relative. The ticking of the clock, even of the most precise clocks we can make, does not exist in an absolute. It depends on the gravity you are experiencing and on your speed. Being on the ...

Einstein theorized that time is relative. Speed slows down time. Frame of reference changes time. "Scientists synchronized two highly accurate atomic clocks and then flew one around the Earth aboard ...

So, you’re driving a car at half the speed of light. (Both hands on the wheel, please.) You turn on the headlights. How fast would you see this light traveling? What about a person standing by the ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Einstein's theory of special relativity teaches us that time is relative. But what does it mean ...

Last week I completed my first self-supported, multi-stage, ultra-marathon “race” in Lapland, above the Arctic Circle. After more than 50 previous ultras, none of which have lasted more than a couple ...