In images widely being circulated on social media, students of Beijing’s Tsinghua University can be seen holding sheets on which is written one of the Friedmann equations. Tsinghua University is a ...

Physics equations, blank white sheets of paper, alpacas — these are just some of the symbols protesters in China are using to show dissent amid the government’s handling of COVID policies. The ...

“The equation is called the Friedmann equation and, simply put, governs the expansion of space in a homogenous universe such as our own. In the 1920s Alexander Friedmann, a Russian astrophysicist, ...