1. First, what color are these circles?
2. Now, look closely. Do these circles overlap?
3. Can you find all 16 circles in this image?
4. See that door? It's aaaaactually not a door.
5. Would you believe me if I said all these lines are parallel?
6. And no, you're not crazy! It looks like this is a moving GIF.
7. Now look at this while blinking quickly, and just try not to lose your mind.
8. Which way is this corner pointed toward?
9. Can you see both the white and black arrows at the same time here?
10. FYI: this is also not a moving picture.
11. And if you cross your eyes while looking at this, you'll get a little surprise:
12. Also, we PROMISE this horse isn't levitating.
13. To see what's in this image, scroll up and down quickly.
14. Now, try to see all 12 black dots in this pic at the same time... without compromising your sanity.
15. And finally: this one? Just your average still image that sure looks like it's not.
This post was translated from Spanish.