These Mindbending Optical Illusions Will Break Your Brain

The McCollough Effect

This illusion is a visual phenomenon in which the colorless gratings appear to be colored depending on their orientation.

Nutella was invented during WWII, when an Italian pastry maker mixed hazelnuts into chocolate to extend his chocolate ration.
For every human on Earth, there are 1.6 million ants.
The Japanese created a smoke alarm for those who can't hear, which pumps super-spicy wasabi mist into the air to alert them.
Dentistry is the oldest profession in the world.