E.S. Hartwell

E.S. Hartwell is a nonfiction author and researcher based in Boston, Massachusetts. Her work begins far from home — in the places where history still leaves physical traces, where a country road or an unmarked archive can hold the answer to a question no one thought to ask.Trained as an economist, s...

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WORTH YOUR SALT - The Hidden Science, Forgotten History, and Surprising Future of Earth's Most Misunderstood Mineral

By: E.S. Hartwell

You use salt every day. But almost everything you know about it is incomplete.Before refrigeration, salt kept entire populations alive. It preserved food, opened trade routes, financed governments, bu...