50 Science Ideas You Really Need to Know is your guide to the biggest questions and deepest concepts from across the whole of science. What was the Big Bang? How did life on Earth arise? What does quantum mechanics tell us about the universe? Is true artificial intelligence possible? And does life exist on other planets? Moving from the basics of atoms and molecules, Newton's laws of physics and the building blocks of life to the cutting edge of nanotechnology, Einstein's theories of relativity