Science In America (a NdGT video)
Transcript of the video, as spoken by Neil deGrasse Tyson: “ How did America rise up from a backwoods country to be one of greatest nations »
On Climate Change: "But the climate has changed before!"
A graphic for visualization (courtesy of xkcd): The Timeline of Earth's Average Temperature (Since the Last Ice Age Glaciation). It's true that it's warmed before, but »