"Motion sickness nausea is caused by a mismatch between what the eyes are saying about the movement of the world and what the ears and other parts of the body(1) are saying."
A theory has been advanced that motion sickness is an inherited survival trait.
Our ancestors could accidentally eat berries or plants which secreted toxic alkaloids. The symptoms would be a disjunction of the visual and spatial senses. Vomiting would be a useful reaction to get rid of the remaining poison quickly.
Biting the hand that feeds IT
