If you replace someone’s brainy neurons with metal ones, how many neurons do you have to replace before it’s not the same person anymore? I’m guessing it’s twelve or maybe fifteen. Twenty tops. Just keep count until they start to vote Tea Party and you’ll have your empirical data.

Repeat Destination Report: Yes, you guessed it! We’re going back to the Inner Science Branes on Friday! Whoopee! I can’t wait.