Inventions, firsts, and turning points tied to today’s date — each one sourced and dated.
On December 14, 1972, the commander of Apollo 17 climbed his ladder for the final time — and no one has walked on the Moon since.
On December 14, 1911, five Norwegians on skis and dog sleds beat a doomed British rival to the bottom of the Earth by a month.
On December 14, 1900, a reluctant physicist told a Berlin meeting that energy comes in lumps — and quantum physics was born.
On a December day in 1819, a presidential signature turned a frontier territory into America's newest star on the flag.
