This past week marked the 100th anniversary of Albert Einstein’s Theory of General Relativity. Einstein was only 26 years old when he came up with it. The theory married space and time together, with one affecting the other. Mass and energy aren’t all that different from each other, either. They all mesh together to produce the universe as we know it.
The UK’s Science & Technology Facilities Council presents a video from Jamie Lochhead and Eoin Duffy that explains the general outline of Einstein’s work in relativity, narrated by David Tennant of Doctor Who. -via the A.V. Club