Why is the sky blue? Why does a bee die after stinging, but a wasp doesn't? Why doesn't an expanding population make our world heavier? These are the fundamental mysteries of life. We think we know the answers, but do we really? In a spectacular mix of simple explanations and scientific facts this book answers 100 of the worlds most intriguing and interesting questions. With genuinely fascinating content, this makes a superb gift for anyone with an enquiring mind. Embrace your inner Einstein.