During one of those screenings, someone noticed a little black dot that was consistent throughout the footage. The monitor they were using had a single dead pixel, which wasn’t noticeable on its ...

More often than not, those dots are dead pixels, also called dark pixels. A dead pixel is a small black square on the screen ...

Can you find the black dot in this grid illusion? Only very high IQ people could beat this grid illusion challenge. The scintillating grid illusion, a variation of the Hermann grid illusion ...