Carried a barometer up Chimborazo and came down with the idea of nature as one connected whole — funded by an empire he spent his life condemning.
She measured before she theorised and reduced tonnes of ore to a decigram by hand — and is the last person you should ask what is safe to handle.
He turned chemistry into an accounting problem and rewrote its vocabulary — on an income collected from the salt tax.
He pointed a better eye at the sky and rolled bronze balls down planes until nature confessed the law of falling bodies.