Inventions, firsts, and turning points tied to today’s date — each one sourced and dated.
On this day in 1954, schoolchildren in Pittsburgh rolled up their sleeves for Jonas Salk's new polio vaccine.
On this day in 1945, a photographer caught the second flag-raising on Mount Suribachi — and made an icon.
A few hundred defenders dig into a crumbling Texas mission as thousands of Mexican troops surround them for thirteen days.
By tradition dated to this day in 1455, Europe's first major book printed with movable type rolled off the press.
