Steffen's polyhedron is a flexible concave polyhedron. Euler thought such a shape was impossible. I also show infinitesimally flexible polyhedrons and bistable polyhedrons. mathematics Video 8:51 13 votes
Measuring the amount of lead (Pb) consumed when drinking from lead crystal glassware. Is it safe? chemistry Video 37:32, published Jul 6 2023 5 votes
Grab a friend and try this crazy ear stretching illusion called "Buddha's Ear Illusion" psychology Video 1:09, published May 24 2023 9 votes
We made a meat-leaf to demonstration of the cutting edge of regenerative medicine, and bioengineering. And maybe as the first stop on the road to meat-robots. chemistry Video 14:02, published Jun 16 2023 10 votes
The $21,000,000,000 hole in Texas - The Superconducting Super Collider physics.nuclear physics.particle Video 2:58:16 28 votes
The first few moments of an explosion can't be simulated yet. But there's a team at the University of Sheffield working on it. physics Video 6:10 12 votes
Ronald Reagan and the biggest failure in physics physics Video 1:02:53, published Mar 20 2022 5 votes
Wire EDM is an insanely precise manufacturing method. But there's a trick behind these objects that appear to have no seam. Video 9:37 7 votes
This microscope uses touch. Gelsight is a microscope that presses gel into the object of study. Video 10:42 9 votes
An overview of the substation attack in Moore County, North Carolina in December 2022 Video 13:08 4 votes
Once a millennium alignment of all three norths mathematics Video 15:54, published Dec 19 2022 5 votes
The turntable paradox: A ball on a spinning turntable won't fly off as you might expect. In fact the ball will have it's own little orbit exactly 2/7th the angular speed of the table. Here's why. physics Video 9:11 6 votes
The world depends on this government warehouse's collection of strange Standard Reference Materials. They're not cheap. chemistry Video 18:32, published Nov 19 2022 1 vote
Why (and how) over 600,000 bird specimens are preserved at the Smithsonian | Colossal Collections biology Video 9:17 4 votes
Why are quintic equations not solvable? - the Galois theory approach mathematics Video 45:24, published Jul 3 2022 3 votes