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 Exploring the Arctic’s Global Seed Vault Discover Nanoscience and It’s Magic How firefighters suck up water with helicopter The Science of Genetically Modified Food Everest Isn’t Necessarily the Tallest Mountain Can Quantum Entanglement Explain Gravity?