In April, 2008, Hawking came to Washington, D.C., to honor NASA on their 50th birthday. He presented a new speech entitled, “Why We Should Go Into Space.” That’s the jumping off point for the video. We wrote it. My friend Craig Duff produced it. Tara created some cool graphics, including the exploding Earth animation, and that ridiculous driver’s license for Homo sapiens.

As if to add an exclamation point to its message, between the time the video was finished and the time it was uploaded, a mile-wide hunk of rock and/or ice slammed into Jupiter. Check out the coverage by Bad Astronomer Phil Plait.

As I said in the Time piece (pun intended), “If that had happened here, you probably wouldn’t be watching online video right now.”