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 Which Life Form Really Dominates Earth? How Do Blind/Deaf People Dream? Inside CERN’s Massive Computer Center The Machine Used to Type Fast in Court Rooms The Secret Soviet Virus That Helps Kill Bacteria How Big Is The Ocean ?