Explainers
Long answers to questions worth asking properly. Each one is visual first, argued in full, and marked throughout with how well we actually know what it says — settled, contested, or genuinely open. They are living documents; they change when the evidence does.
Is it true that all the elements in the human body come from stars?
Mostly, but not entirely — and the exception is the most abundant thing in you. Around three out of every five atoms in your body are hydrogen, and no star has ever made a hydrogen nucleus. Stars destroy hydrogen; they do not create it. Those atoms were made in the first microsecond after the Big Bang and have been passed along ever since. By count, you are mostly older than stars.