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Sit back and relax. Enjoy 9 minutes of oddly satisfying scientific curiosities featuring various mind-blowing stuff!

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This video contains:

👉🏻 Ambiguous Object Illusion: repost of this incredible design by Kokichi Sugihara of Meiji University in Japan, the inventor of this illusion and art form. A clever combination of reflection, perspective, and viewing angle produce this striking illusion. My vote for best gift from the G4G13 exchange last year.

👉🏻 Bismuth Diamagnetic Levitation: Element 83 (bismuth) is the most diamagnetic of the elements*. Here a small neodymium magnet is made to float between two 99% pure bismuth 10mm cubes which are held in precise configuration by friction with the parallel walls of the acrylic assembly I made. Diamagnetic substances only have magnetic fields of their own when placed in an external magnetic field from another source- here the tiny cube magnet supplies the field.

👉🏻 Jansen’s Linkage Walker: a mesmerizing motorized sculpture that features Jansen’s linkage- a unique leg mechanism which converts rotary motion of a crackshaft into smooth walking motion.

👉🏻 Precision Doodle Top: a sharpened pencil lead serves as the point of this wooden spinning top and records the path of contact revealing the intricacies of its precession and motion as friction slows the system down.

👉🏻 Faraday Train Kit: a battery with magnets on both ends and a coil of bare copper are the simple essence of this self propelled craft.

👉🏻 Kinetic Magnetic Wave Wires Kit: explore the surprising ways oscillating kinetic energy is exchanged when repulsive magnetic fields allow masses on springs to interact with each other. Here three weighted springs dance in chaotic motion as they trade kinetic energy.

👉🏻 Tensegrity Mobile Stand: thin cables levitate and support a smartphone at an angle in this high tech precision machined version of the tensegrity concept, invented by Kenneth Snelson and made famous by the architect Buckminster Fuller in 1949. This stand by Kontax Engineering Ltd came as a kit and was a lot of fun to assemble.

👉🏻 Hyperbolic Holes: a straight rod, in this case a pencil, glides through a symmetrical pair of curved holes related to the famous conic section.

👉🏻 Homopolar Motor Type 2: another take on an easy to make minimalist electric motor design: battery, wire, and a magnet attached to the head of a screw which serves as the rotor.

👉🏻 Pharaoh Hollow Mask Illusion: this ceramic lamp features a concave image lighted from the bottom, which appears as a regular convex image via this vintage version of the hollow face illusion.

👉🏻 Hollow Mask Dragon Illusion

👉🏻 Self Propelled Homopolar Motor: cylindrical neodymium magnets supply the static magnetic field for this motor and become the wheels of a very simple vehicle with an AA battery as the energy source.

👉🏻 Viral stuff on internet vs @physicsfun

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