You can support the project by following the links: If you are in Russia: https://boosty.to/vertdider If you are not in Russia: / vertdider "Parallel lines do not intersect." Sound familiar? But are you familiar with another idea? Euclid wrote (just read carefully): if a line falling on two other lines forms interior angles and angles on the same side, each of which is less than 90 degrees, then these two lines, continued indefinitely, will sooner or later meet on the side where the angles are less than two straight lines. Why did he write this? This riddle tormented mathematicians for 2,000 years. Trying to prove or disprove this idea, they invented non-Euclidean geometry and helped the development of science, as well as our understanding of how the Universe works. Derek Muller talks about this in detail and, we hope, clearly in a new video from Veritasium. Oh, and don't forget to support us Translation: Elena Smotrova Editing: Alexey Malov Scientific editing: Elizaveta Mironova Voice-over: Dmitry Chepusov, Alexey Mayorov Sound editing: Andrey Fokin Video editing: Yuri Khomyakov Thanks for your support on / vertdider and https://boosty.to/vertdider Vert Dider voice-overs are released with your help: Pavel Dunaev, Mikhail Stolpovskiy, Sergey Zhukov, Amir, Eugene Tsaplin, Мikhail Samin, Kulyash, Oleg Zingilevskiy, opperatius, Mykola Korniichuk, Anatoly Zapadinsky, Pavel Parpura, Anton Bolotov, Katoto Chan, Vitaliy Vachynyuk, Ihar Marozau, Irina Shakhverdova, Aleksei Shabalin, Kirill Zaslavskii, Victor Cazacov, Oleksandr Hrebeniuk, Timur Sattarov, Valeriy Dubrava, VEG, Vladimir Sharich, Morock_D, Alexander Goida, Maxim Korotkov, Alex Kulakov, Leonid Steinberg, Anna Ostrovskaya, Alexander Lebedev, Lexx, Nikrodol, Rashn, Rincewind, Sonra44, Viktor Kharlamov, Shurik Samara, Alien, Artem Piskarev, Artem Sobolenkov, Artem Sobolenkov, Being of Whiteout, Cyril Anonimov, MaximML , Rekvet, Timophey Popov, Timur Rahmatulin, Timur Rahmatulin, asdadasa, dv0, pervprog, Adam Schiff, Alexander Denisov, Ars Nik, Artem Sivachenko, Vasily , Gleb Kochergin, Dmitry Kazanov, Ivan Novikov, Ilya Zverev, Kozhany Gus, Nikita Omelnitsky, Nikita Omelnitsky, Nikita Omelnitsky, Nikita Omelnitsky, Nikita Tsikalin, Timur Abdullin, That same Victor, Alexandra Menshikova. #vertdider #veritasium Studio website: http://vertdider.tv We are on social networks: - http://vk.com/studio_vd - https://t.me/vertdider - / vert_dider Permission to publish: https://bit.ly/2SFhrHZ © / @veritasium Source: • How One Line in the Oldest Math Text ...