🌐EnglishEnglishBahasa IndonesiaDeutschEspañolFrançaisItalianoPolskiPortuguêsSvenskaTiếng ViệtTürkçeРусскийالعربية中文日本語EntityQ2736217· pop 11· linked from 77 articles1921 in scienceoverview of natural science-related events during the year of 1921Connectionsnatural historyEntitylist of years in scienceEntityCategories1920s in science1921 in science20th century in science