His idea was that, theoretically, the closer we come to traveling at the speed of light ... slowing of time due to motion time dilation. Imagine you're standing on Earth holding a clock.

An object moving close to the speed of light experiences time dilation. Its clock slows down. So for someone on board, the spaceship accelerating at 1g would take just 20 years to reach the center ...

We love clocks, and [Chris] got our attention with the internet enabled Light Clock. Time is displayed via RGB LED strip in a number of different ways around a 3D printed white disk. All the ...