Darwin's story is but one story in the chapter on “Physicians and Scientists: Coming out of the Medicine Closet.”
During Darwin's trip to South America in the mid-1830s, he became very ill. Although different historians and physicians have hypothesized on what ailment he had, there is no consensus, except to say that he was seriously ill. Ever since 1837, he suffered from persistent nausea and vomiting, heart palpitations, widespread boils, and trembling, and since 1847, he had fainting spells and spots before his eyes...and his symptoms were getting increasingly worse.
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