Famous physicist Sean Carroll, in his characteristically fascinating manner, explains the principles that underlie scientific revolutions from Darwin to Einstein, and shows how incredible scientific discoveries of the last century have changed our world. What is life and death, what is our place in this of the Universe, how the world works at the quantum, cosmic and human level, how universal human values are related to science. Fourteen billion years have passed since the Big Bang, the observable region of space is filled with several hundred billion galaxies, each galaxy containing an average of one hundred billion stars. Man is a tiny, invisible creature. Compared to the Universe, man is even smaller than an atom compared to the Earth. We are small, the Universe is great. And we have no instructions for knowing it. However, we have learned a surprising amount about exactly how things work.