It's not that the Duchess of Cambridge is having a bad day or has an allergy to vehicles. It's much simpler than that: Prince William's wife suffers from motion sickness. Perhaps the technical name doesn't tell you much, but it's something that impacts millions of people around the world. Motion sickness is a fairly common problem that occurs in people when they travel by car, train, plane, and especially by boat.
Watch the video above to learn more!