What Happens If Everyone Jumps at Once?

8 billion people can't move the Earth. 17 people in a gym shook a skyscraper. 🏢 Sources: • Earth recoil estimate (center-of-mass), NASA Earth fact sheet: https://nssdc.gsfc.nasa.gov/planetary/factsheet/earthfact.html • UN World Population Prospects 2024: https://population.un.org/wpp/ • Walpole et al. 2012, The weight of nations (average adult body mass): https://bmcpublichealth.biomedcentral.com/articles/10.1186/1471-2458-12-439 • xkcd What If #8, Everybody Jump: https://what-if.xkcd.com/8/ • Korea JoongAng Daily, TechnoMart shaken by gym test (2011): https://www.koreajoongangdaily.com/korea/technomart-shaken-by-gym-test/11256290 Video: 3D animation by FunNotSoFun, not real footage, not to scale. • Earth day map and clouds: Solar System Scope, CC BY 4.0: https://www.solarsystemscope.com/textures/ #shorts #funfact #notsofunfact #facts #earth #physics #whatif