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Brain teasers, puzzles, online games, optical illusions and jigsaws.

User submitted and ranked brain teasers, riddles, quizzes, trivia, logic problems and mind puzzles. Free online games and message boards.

Brain teasers, cool optical illusions, riddles and other cool stuff!

World-Mysteries.com. Explore with us lost civilizations, ancient ruins, sacred writings, unexplained artifacts, and science mysteries. Introduced are alternative theories, popular authors, books, and resources on the Internet.

Biggest Optical Illusions blog. Dedicated to visual phenomena and real life illusions. Daily updated.

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Facebook is a social utility that connects people with friends and others who work, study and live around them. People use Facebook to keep up with friends, upload an unlimited number of photos, post links and videos, and learn more about the people ...

eyetricks.com provides a wide selection of online optical illusions and other mind teasing oddities.

Optical Illusionist, your source for mind boggling optical illusions and puzzles.

A family-friendly collection of optical illusions, brain teasers, fun riddles, tactile tricks, mental games, and unusual self-deceptions.

The all-things-gifted site for parents and educators of gifted children, including articles and research, books, organizations, on-line support groups, academic programs, and lots more!