Inventions, firsts, and turning points tied to today’s date — each one sourced and dated.
The last Saturn V ever flown carried America's first orbiting laboratory aloft—then nearly cooked it in the first minute of flight.
In 1796 a country doctor noticed milkmaids didn't catch smallpox — and the word "vaccine" still carries the Latin for cow.
About a hundred English settlers waded onto a marshy island and started the first permanent English foothold in North America.
