📜 For hundreds of years, Euclid's geometry disappeared with the fall of the Roman Empire. But in Constantinople, Islamic mathematicians, including Al-Khwarizmi (who gave us the word "algebra") worked long and hard on proving the Fifth Postulate. * Watch Extra History ad-free & get 1-week early access on *NEBULA* * Suggest & Vote on our next episodes, get exclusive content & 24-hour early access on *PATREON* * Show off your fandom with *MERCH* from our store! * Interested in sponsoring an episode?* Email us: extracredits@ TWITTER: I FACEBOOK: INSTAGRAM: I TIKTOK: BLUESKY: I TWITCH: GAMING: @extracredits *Miss an episode in our Non-Euclidean Geometry Series?* Part 1 - Part 2 - Part 3 - Part 4 - Part 5 - Series Wrap-up & Recommended Reading / Lies Episode - ♪ "Postulate S" by Sean & Dean Kiner - Thanks for the high-quality conversations & for following our community guidelines here: Artist: Nick DeWitt I Writer: James Portnow I Voice: Daniel Floyd I Editor: Dan Jones I ♪ Music by Demetori: I #ExtraHistory #WorldHistory #History