This episode recounts two historical mysteries: the 1901 incident where two academics allegedly time-traveled to see Marie Antoinette at Versailles, and the secret contributions of the "Gallaudet 11." These deaf men, whose damaged vestibular systems made them immune to motion sickness, were crucial test subjects for NASA’s early spaceflight research. Their unique physiology helped scientists understand zero-gravity effects, paving the way for successful manned missions.