The Universe Explained - Part3: Flat Universe

http://tidd.ly/7078cdc6 HumaxDirect secret sale page.
In this third part of the expanding universe, Lawrence Krauss gives and explanation into why we know that we are living in a flat universe and what the consequences are for us all. Playlist url: https://www.youtube.com/playlist?list=PLdWz0_n7oyhcINTcIwUcmnT8inK-hxwDi Titles in this series playlist: The Big Bang Expanding Universe Flat Universe Universe From Nothing Coincidence or Design