Prescience

Prescience

(alt-text)

Lots of people called their ships unsinkable before the Titanic. Voicing your hubris doesn't make failure more likely, just more memorable.

What If? is now on YouTube!
Check out the first video for the answer to
“What if we aimed the Hubble Telescope at Earth?”
and follow xkcd’s What If? The Video Series channel to be notified about each new video.