How Do We Know The Universe Is Flat? Have you ever wondered how astrophysicists know that the universe is flat? Facebook Prev Article Next Article Discover Checkout these cool gadgets... Related Posts Feel The Unreal, Virtual World How Mass Shootings Are Contagious The Legendary Voice Behind Movie Trailers 7 Images Almost as Freaky as #TheDress Warmer Temperatures Could Lead To More Lightning The Fighter Jet That Shot Itself Down