We are making history again by presenting a new visual proof of the 2000+ years old Ptolemy's theorem and Ptolemy's inequality. 00:00 Introduction 04:27 Geometry 101 08:19 Applications 14:46 Ptolemy's inequality 18:34 LI
YOUTUBE · MATHEMATICS
We are making history again by presenting a new visual proof of the 2000+ years old Ptolemy's theorem and Ptolemy's inequality. 00:00 Introduction 04:27 Geometry 101 08:19 Applications 14:46 Ptolemy's inequality 18:34 LI
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YOUTUBE · CRAZY MOMENTS
Viral global compilation of mind-bending luck and unbelievable near-miss moments.
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YOUTUBE · BUSHCRAFT
Silent bushcraft: one person, hand tools and a forest, from first tree to finished cabin.
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YOUTUBE · ART & CRAFT
Masterpieces folded from a single square of paper without a single cut.
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YOUTUBE · ENGINEERING
A mesmerizing 3D animation showing exactly how gears keep perfect time without batteries.
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YOUTUBE · VIRAL VIDEO
Bill Wurtz takes you on a fast-paced 20-minute musical journey of cosmic history.
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YOUTUBE · CLASSIC
From a picnic blanket to the edge of the universe and down into a single atom.
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