When you read in the back seat of the car, your eyes tell your brain you're still. But your ears can sense you're moving. Your eyes and ears are having an argument that your brain is trying to settle.
Thanks to hundreds of fossil remains found in Africa studies can explore new scenarios about how our ancestors lived and evolved.
The fact we are almost totally unaware of this elegant reflex is evidence of the superb, undercover work the balance system does for us.
It is estimated 30% of the general population have experienced moderate to severe dizziness at least once in their lifetime.