What causes motion sickness?

A.Your brain is confused
B. Your body senses poison
C. BothA&B
D. Motion sickness isn't real

The answer? C.

One theory behind motion sickness is that your brain experiences a glitch, gets confused, and believes it's being poisoned.

This whole mix-up is basically the result of evolution not catching up to technology. Cars, boats, trains – they haven't been around long enough for our brains to adapt. Our brains cannot recognize how high-speed motion from vehicles affect our bodies, unlike walking which we've had millions of years to adapt to.

In a moving vehicle, you are likely sitting still—your muscles are not moving and your eyes are probably not taking in much information, besides what you can see out the window.

But even though your body is still, your vestibular system—a sensory system that keeps you balanced—is experiencing the high speeds that you're traveling. Your brain is getting mixed signals, making it confused.

And according to one theory, your brain may attribute this confusion to a neurotoxin , aka poison.

How does your body respond to a potential poisoning? Well…that's where those barf bags on airplanes come in handy.

Where do you experience motion sickness? Roller, coasters, airplanes, or just on a car ride?

Let me know on Twitter @AngeliGabriel, though maybe spare me the gory details.