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 How the Meter Became the Meter We produce 13 tons of hazardous waste every second Unbelievably Strange Things On Other Planets Is DNA the future of data storage? Why We Live Where We Do – Urban Geography Why Don’t All Blue Whales Have Cancer?