A spacecraft traveling at 99 percent the speed of light toward Alpha Centauri would cross 4.3 light-years in what feels like ...

A playlist of tiktoks I did on Time Travel. TIMESTAMPS: 00:00 - Intro 00:23 - Building a clock is impossible 01:21 - No but ...

Tracking time is one of those things that seems easy, until you really start to get into the details of what time actually is. We define a second as 9,192,631,770 oscillations of a cesium atom.