It seems like a 8,848-meter mountain would be easy to spot, but it's oddly challenging to find Mount Everest from a few hundred kilometers higher in elevation. The famous mountain is visible in each of these photos from the International Space Station, but can you find it?
In less than a decade, Sudoku has gone from obscure logic puzzle to global phenomenon. Scientists have built up an entire sub-field of mathematics around this game, mostly to answer one question: what's the toughest possible puzzle that's actually solvable?
Can you uncover the mystery behind their new viral site for the apocalyptic movie 9? We've got an exclusive piece of the puzzle, to help you uncover what the rag-doll people are trying to tell you. Check it out below.