Did you know that the average person blinks 15-20 times per minute?! “Although some of this blinking has a clear purpose—mostly to lubricate the eyeballs, and occasionally protect them from dust or other debris—scientists say that we blink far more often than necessary for these functions alone.”
And people tend to blink in very predictable ways, as well.
Continue reading at: Why Do We Blink So Frequently? | Surprising Science.