Why does our stomach feel queasy on a winding road?
The Sensor Squabble
Why does our stomach feel queasy on a winding road?

You're in the back seat, winding up a mountain road. Left turn, right turn, dip, curve. Your stomach starts to feel… weird. Like it's sloshing around in there, complaining. Why does a twisty road turn your belly into a grouch?
Inside your skull sits your brain's balance department: your inner ear. It's filled with fluid and tiny hairs that wave around like underwater grass. When you tilt or turn, the fluid swoshes, the hairs bend, and your brain gets the message: "We're moving left now!" This system is usually your body's champion at knowing where you are in space.
