Inventions, firsts, and turning points tied to today’s date — each one sourced and dated.
A routine ground rehearsal turned fatal in seconds when a spark met a cabin pressurized with pure oxygen.
When the Red Army reached the gates, it found a few thousand survivors too ill to march — and the machinery of more than a million murders.
A flimsy thread of carbon, glowing inside an airless glass bulb, became the patent that wired the modern world.
