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The World's Strangest Medical Conditions

The human body is capable of some truly incredible... and sometimes unbelievable... things. In Part 1 of our Mysterious Medical Conditions series, we're exploring several rare disorders that sound like something out of a science fiction novel but are very real.

From Alien Hand Syndrome, where a person's hand seems to act on its own, to Alice in Wonderland Syndrome, which can dramatically distort a person's perception of size and distance, these conditions challenge everything we think we know about the brain and body. We also discuss the incredibly rare allergy to water (aquagenic urticaria)…

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