The humorist behind xkcd, the stick figure web comic where you hover your cursor over the strip to get the invisible punch line, has debuted a new weekly comic, What If? So far he has tackled a question about the SATs and statistics and one about the results of throwing a baseball at light speed.
The new comic, which will appear each Tuesday, answers readers' hypothetical questions using physics -- and plenty of humor. xkcd and What If? are the brainchildren of Randall Munroe, a former NASA roboticist and programmer.