42 Of The Most Bizarre And Unsettling Medical Posts Shared Online

Your eyes, too, have their own fascinating ways of reacting to the world. They can, for example, let you know when your body’s too cold.

“When hypothermia becomes severe, blood vessels in the eyes constrict to conserve energy,” Rupe Hansra, OD, senior director of eye care at LensCrafters, told Woman’s Day.

In certain cases, this can even cause temporary vision loss, something model Kate Upton once experienced during a swimsuit shoot in Antarctica, when temperatures dropped to –20°F.

But your eyes can also sense the coming of spring—itching and watering when pollen counts rise before the weather even warms up.

When you put all this together, it’s clear: our bodies are like living laboratories, full of strange reflexes and hidden talents we don’t even realize we’re using.

From hiccups to brain freeze, from weather-predicting knees to wrinkle-prone fingertips, every odd thing we do has some story behind it, even if scientists are still figuring out exactly why.