Idea of the day
Why Does the Universe Seem Fine-Tuned for Life?
When hydrogen fuses into helium inside the Sun, about 0.7 percent of its mass turns into energy. You learn why physicists say life depends on numbers like this one, and how the anthropic principle, the multiverse and the idea of a designer each try to explain it. You also learn the strongest doubts about the whole argument, and a habit of thought that helps far beyond physics.
Physics & Chemistry7 min read · 3 questions