Spirals or concentric circles? Look at the figures below, What do you see? Are both of these images of spirals plummeting toward the center or does one of these images have only concentric circles?
The truth here is that both images are of concentric circles. The top image is very hard to believe and many of you will mark up your screen with finger prints trying to trace the circles. Here is a little hint, trace the circles on the top image in a clockwise direction otherwise you could go crazy and swear that I'm lying to you.