Inventions, firsts, and turning points tied to today’s date — each one sourced and dated.
A chain of Pacific islands 2,400 miles from the mainland completed the United States as we know it.
A handyman walked out of the Louvre with Leonardo's portrait under his smock — and accidentally made it a global icon.
A frustrated bank clerk's invention tamed the drudgery of arithmetic and seeded a computing dynasty.
