Inventions, firsts, and turning points tied to today’s date — each one sourced and dated.
On the steps of the Lincoln Memorial, King turned a scripted address into an improvised vision that reshaped the civil rights era.
Spotting a faint speck beside Saturn's rings, Herschel found a moon that would later astonish scientists with its icy plumes.
Sailing for the Dutch in search of a shortcut to Asia, an English captain stumbled into a wide American bay instead.
