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" HowStuffWorks Show: Episode 4: Water Is Life Water is the perfect medium in which life can form and reform. Medical Mysteries: Chemical Reaction From the Discovery Health program Mystery ER, a college student is disoriented and feels as if she has been drugged. Mystery Diagnosis: A Small Chance Check out this clip from Discovery Health's 'Mystery Diagnosis' to learn more about the process medical professionals use to determine the nature of a patient's illness. Mystery Diagnosis: A Strange Loss of Sensation Mystery Diagnosis: An Unquenchable Thirst Mystery Diagnosis: Bizarre Lumps Mystery Diagnosis: Black Legs Mystery Diagnosis: Menstrual Leakage Mystery Diagnosis: No Laughing Matter Mystery Diagnosis: The Boy Who Couldn't Stop Eating Mystery Diagnosis: Unexplainable Swelling All Videos In Physical Science.