If you’re curious about the world we live in, you’ve come to the right place! With sections on Environment, Technology, Science, Space, Transport and History, you are sure to satisfy your hunger for knowledge here. If you’ve ever questions how YouTube works, what would happen if two planets collided or what airless tyres are, this is the book for you. Featuring: Environment - How long can a… nimals live? Why are rain clouds grey? What is inside of a bird’s egg? Science - What are the laws of thermodynamics? What is the blood-brain barrier? What if we cut down all the trees? Space - What is a cosmic catastrophe? What are white holes? What animals have been to space? History - What are the origins of espionage? What is the Tesla coil? What did it take to become a knight?