Our eyes close automatically to protect us from perceived dangers.

Our eyes close automatically to protect us from perceived dangers

More from the Human Body Facts niche...

Human Body Facts

There are about 39 million people that are blind around the world

Human Body Facts

Some people say that you only use around 10% of the power of your brain.

Human Body Facts

Because your digestive system is so powerful, your stomach actually eats

Human Body Facts

You see things upside down – it is your brain which turns the image the

Human Body Facts

The shark cornea is nearly identical to the human cornea, and has even

Human Body Facts

The retinas inside the eye cover about 650 square mm and contain 137