📅 October 21 in the Time Tunnel
What happened on October 21? Travel back in time and find out — then test yourself with the quiz.
⏳ On this day in history
- 1824Portland cement, still used to build houses and bridges, was patented
- 1879Thomas Edison tested a long-lasting light bulb that glowed for over 13 hours
- 1959The Guggenheim Museum in New York opened to the public
- 1965Comet Ikeya–Seki passed extremely close to the Sun
🎂 Born on October 21
- 🏅 Alfred Nobel (1833) — chemist who created the Nobel Prizes
See everyone born on October 21 →
October 21 quiz
In what year? 🧱 Portland cement, still used to build houses and bridges, was patented
In what year? 💡 Thomas Edison tested a long-lasting light bulb that glowed for over 13 hours
In what year? 🌀 The Guggenheim Museum in New York opened to the public
Which famous person was born on October 21?