The Poison Theory

The poison theory attempts to provide an explanation for why motion
sickness and cybersickness occur from an evolutionary standpoint. The
theory suggests that the ingestion of poison causes physiological
effects involving the coordination of the visual, vestibular, and
other sensory input systems. These physiological effects act as an
early warning system which enhances survival by removing the contents
of the stomach.
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For a sucessful technology, honesty must take precedence over public
relations for nature cannot be fooled.
Richard Feynman