India, July 16 -- Have you ever observed an image and noticed two things simultaneously? This is exactly what happens when you see the famous duck-rabbit illusion, which has been confusing people for more than a century. At first, when you look at it, you may notice a duck facing to the left. If you take another look. Is it really a rabbit facing toward the right?

This optical illusion explains how our eyes and brain together interpret what we observe. Yet at times, they become somewhat confused, and that's when the real trick starts.

If you see the duck, you might seem calm on the outside but be thinking deeply on the inside. Like a duck floating on the water, you may seem at ease, yet your thoughts are always moving. You are a thought...