Book excerpt: Get your pulse racing with Australia's most popular scientist, Dr Karl Kruszelnicki. Discover why people tell lies, why some planets are hotter than stars and how humans are terraforming the Earth. Is cockroach milk really the next Superfood? Why are birds so smart? Why do trees need each other to grow and how do they communicate? Why did a group of scientists voluntarily starve to death while surrounded by tonnes of food? How long does a decapitated head stay "alive"? What human artefacts can be seen with the naked eye from the International Space Station? Who is Bertha Benz and how did her first car trip revolutionise how we use petrol today? Finally, monitor your breathing and learn why whales are so big, why oral histories are surprisingly accurate and try the five tried-and-tested steps to becoming a wellness guru.