Imagine a world without curiosity. A world in which Isaac Newton simply picked up the apple and took a bite, rather than questioning why it fell and developing his theory of gravitation; a world in which Thomas Edison never felt the urge to experiment with electric lighting until he was able to create the first light bulb safe enough for use in the home, and a world in which Steve Jobs never pondered whether a mobile phone could do more than make calls. Makes you think, doesn't it?