India, July 21 -- Brain teasers and optical illusions are quite useful for improving a person's cognitive skills. We easily miss out on the little details in the fast-paced world. Simple mistakes, such as not being able to spot an object in front of you or overlooking small errors at work, happen due to a poor attention to detail.

This is where brain teasers come in, because they put your observation skills to the test. One such challenge is this challenge doing the rounds on Reddit. Shared a few days ago, it has already stumped several users.

The post contains an image of the ground in a jungle. It is filled with leaves, twigs, branches and dirt, which makes it difficult to spot minor differences. At first, nothing seems out of place. ...