Today You Should KnowCurious about how the world works? Subscribe Sent Weekly Archive Sample EnglishEducationScienceTechBooksLearningHistoryLearn something new every Friday. Join 800+ nerds and satisfy your curiosity one question at a time with topics including science, technology, history, and more.Interested InCross PromotionInterested InSponsorshipSubscribersðClick RateðOpen RateðAdded OnðCaitlin Olson Contact ToolsConvertKitStatsð Viewsð ClicksDaily roundup of Gossip, Trends, Business, Tech, Pop Culture & Lifestyle news.PromotedReviews of Today You Should KnowNo Reviews Posted YetAdd Review