The illusion below is a great example of how our eyes and brain can play tricks on us. There are different statistics floating around the net, but a recurring number is that only 1 in 5 can solve this...

One night, a wife found her husband standing next to their baby’s crib. She watched him quietly. As he stood looking down at the sleeping infant, she saw on his face a mixture of emotions: disbelief, doubt, delight, amazement, enchantment,...