Inventions, firsts, and turning points tied to today’s date — each one sourced and dated.
A dying dentist volunteered to live tethered to a machine so doctors could learn whether a mechanical heart could keep a person alive.
In a squash court beneath Chicago's Stagg Field, humanity first tamed the atom.
With the Pope looking on, Napoleon took the crown into his own hands and made the gesture of his reign unmistakable.
