Introduction. There is no free lunch. Temperature and energy: science for the environment. Painting by numbers - elements and particles: science as prediction. Why you cannot unscramble an egg. Time and entropy: science and the unity of knowledge. How the butterfly caused the tornado - chaos and life: science as synthesis. Now you see it, now you don't - quantum theory: science and the invention of concepts. The galactic highway - cosmology: science as history. Weirdness or purity - mathematics: science as numbers. The last question: does God exist? Love of my life: science as human activity. References. Glossary. Index.