Here's a classic stumper.... READ ON
Use the power of logic to escape zombies!... READ ON
This doesn't involve removing the stickers.... READ ON
Don't let the aliens eat you—and your hat!... READ ON
Bet you can’t solve this one behind your back. ... READ ON
Holiday greetings await anyone bold enough to try to crack the code. We think.... READ ON
Matt Gaffney writes a weekly crossword for mental_floss.... READ ON
Twitter's bird logo is named Larry, for Larry Bird.