Square Roots Are Easy If you needed to find the square root of four, this would be pretty easy. The square root of four is either two or negative two. Negative two times negative two is four. Two times two is four. This is something we learn in elementary school, or […]
Light Cones and Time Travel
Physics of Time I was watching this very interesting series of videos recently on the physics of time. Time is something that is very difficult to think about because unlike other subjects of science you can’t think about it objectively. Even if you’re doing a mental experiment you can’t really put time in front […]