Prepare to exercise your mind as you investigate big ideas in this philosophical question and answer series. Cool illustrations, brainteasers, and quirky quotations add to the simple and fun question-and-answer format, introducing readers to life's important questions.

What's in empty space if it's not empty? What makes something funny? Can elephants cry? and what came first: the chicken or the egg? Get the answers to these questions and more in the fifth installment of the Really, Really, Big Questions series. The most common questions about living things, the weird world around us, inventions, and Earth are asked and answered through humorous writing, funky art, and fun features like opitcal illusioins, quotes and mind-teasers.