TED-Ed: The mystery of motion sickness - Rose Eveleth

Motion sickness affects a third of the population and is thought to be caused by mismatched sensory signals between the eyes and the vestibular system in the ear. While the exact cause is unknown, theories suggest evolutionary reasons or difficulties in maintaining posture. Remedies exist but are not always effective, and motion sickness remains a challenge, especially in high-stakes environments like space travel.

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