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Is the normal one-sided memory game just too easy? Get ready for a challenge with Space Brain Twister! Brain Twister Is the Only Double-Sided Memory Game in the World. Brain Twister offers a unique twist on the classic matching game: both the front and back images of each playing tile must be the identical photograph in order to complete the match. Discovery Channel Space Brain Twister is licensed by Discovery Channel and features spectacular licensed NASA Space Photography on both sides of each tile. Photographs include the Space Shuttle Endeavor, the remnants of a Supernova, the International Space Station, and many more!