In this episode, Stephen Hawking says to survive, mankind must colonize space. Right -- and the emissivity of a body is equivalent to its absorptance at the same temperature! Then, I interview Democratic Congresswoman Diana DeGette from Colorado -- or Wyoming. I have trouble telling those two apart. And historian Douglas Brinkley is here to discuss his book on Hurricane Katrina. I ask what lessons we can ignore this hurricane season. This is The Colbert Report or, for our foreign viewers, THIS IS THE COLBERT REPORT.