Back in 1952, London, England was engulfed in a think blanket of smog that was so nasty that it caused the city to come to a halt, and actually ended up killing an estimated 12,000 people. SciShow looks back at this tragic result of industrial development without controls.
Students from the Ithaca College Low Temperature Physics Lab created a neat version of a quantum levitation track. It still uses supercooling and magnets to work its magic, but adds a fun (and literal) twist to by running its course around a triple-twist Möbius Strip.
Veritasium takes a look at a neat physical property – the ability to levitate a lightweight ball or disc atop a jet of water. The trick involves getting the water to flow along one side, runs up and over the object, creating a state of equilibrium which allows it to spin.
If you thought the expressions beatboxers make while producing sounds were weird, wait till you get a load of this. Tom Thum allowed a doctor to place an endoscopic camera with a view of his throat while he beatboxed. The video is equal parts fascinating and disgusting.
The Action Lab shows off a cool property of polyethylene glycol, a chemical with a crazy high molecular weight. As a result, they stick together in very long chains, so once he pours out a little bit of the liquid, the rest follows on its own, much like metal beads do.
The process of sandwiching oil and ferrofluid between sheets of glass is messy to say the least, but the result is amazing – the ability actually view the radiating fields created by magnets placed on the surface of the glass. Magnetic Games shows us how its done.
Ideally, you’ll strap on a VR headset for this, but if you don’t have one, you can still appreciate the ethereal fractal journey that Julius Horsthuis has laid before you, accompanied by excerpts from one of evolutionary biologist Richard Dawkins‘ most profound lectures.
They sound cute and cuddly, but the white dwarfs that Kurzgesagt is talking about here will be the last bastions of light and energy in the universe as our universe eventually expires. These highly dense objects are basically the remnants of stars after they burn out.
John Edmark has created a variety of static and kinetic objects, many of which share a common thread – spirals, which he uses because of their potential to go both infinitely small and infinitely large – a reflection of the endless nature of the universe. More here and here.
Destin of Smarter Every Day follows up his epic high-speed video of a Prince Rupert’s Drop being shot by shooting it with a bigger bullet. Instead of a lead-tipped .22, he works up to a .38 cal bullet with a full metal jacket, and it doesn’t behave as expected. (Thanks Orion!)
Hold a floating, glowing microcosm in your hand. Simply fill the hand-blown, flat-bottomed glass orb with the included dinoflagellates and seawater to create a beautiful bioluminescent blue glow. The creatures thrive on sunlight and simple nutrients by day, and glow by night.
For Inventables’ fidget spinner challenge, Giaco Whatever decided to see if he could make one that could float in mid air. After a bunch of experimentation, he was able to get it to work by placing it between two opposing magnetic fields, and spinning it for stabilization.
ElectroBOOM’s Mehdi Sadaghdar expresses his disdain for “perpetual motion” devices which are claimed to produce more energy than is put into them, thus defying the basic laws of physics. The only thing these guys seem to be able to actually generate are YouTube views.
Grant “The King of Random” Thompson previously tested the myth that mixing propane and Coca-Cola would turn it into a pressure-packed rocket, and failed. He tried it again with butane, and the highly-flammable stuff works brilliantly. Definitely don’t try this one at home.