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Chapter 11: Radioactivity
— When atoms break apart — the energy that powers the stars and heals the sick. —
Why this matters
(I once held up a small piece of rock and told my class, "This rock is radioactive. It has been slowly decaying for billions of years, and it will continue to decay long after every one of us is gone." You could have heard a pin drop. Radioactivity is one of the most fascinating and misunderstood topics in all of science. It is the energy that powers the sun and the s
