One of the easiest ways to gauge brain activity is via optical illusion visuals, which are intentionally misleading.
Researchers in the field of neuroscience have also studied the brain's reality perception using images of optical illusions.
Some research suggests that completing optical illusion puzzles on a regular basis might help people become more creative thinkers and problem solvers.
The picture up there shows a scene in a forest.
Near a tree, a canine may be made out. However, the canine isn't the only one.
Somewhere in this photo, there's a cat hiding.
Take this challenge to see how good of an observer you are.