Fun Science

A viscoelastic fluid can pour itself, known as the open channel siphon effect.

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Ferromagnetic Liquid Ferromagnetic liquids are colloidal systems consisting of nanometer-sized ferromagnetic or ferrimagnetic particles suspended in a carrier fluid, commonly an organic solvent or water.

3D Printed Pizza Chef 3D is a new development of BeeHex 3D printers, initially developed to print food for astronauts. However, the concept has changed as the project progressed, so the printers were redesigned to print pizza. The developers describe the final product as a network of pizzerias, where customers choose their own ingredients for pizza and even watch the process of "cooking-printing".

In spring, Helsinki let an electric, FULL-autonomous sweeper into the streets. Place your bets, in how many years will they appear everywhere?

Nikola Tesla's "Egg of Columbus" As legend has it, Christopher Columbus said he could put an egg upright. When nobody believed him, he broke the egg at one end and set it. Responding to the objection that anyone could do it, Columbus replied, "Anyone can do it, but I did it". Meanwhile, Nikola Tesla showed that an egg (or at least an egg-shaped piece of metal) could be put upright with the help of an electromagnetic field.

What are the hazards of viruses? Viruses are small pieces of DNA containing 10-100 genes. They penetrate cells and take over the control of protein production, subjugating the cell and it starts releasing copies of the virus in large quantities. As the viruses multiply, the normal functioning of the cells and then of the whole body is threatened.

How botulinum toxin works Botulinum toxin causes damage to various structures of the peripheral nervous system: neuromuscular synapse, nerve endings. The toxins selectively block the release of acetylcholine in these structures, and simply put, turn the muscle off 👉🏻 it does not contract. (This is the reason for the smoothing of wrinkles in cosmetology).

Double Pendulum Motion A double pendulum is a pendulum with another one attached to its end. The motion of the pendulum is governed by coupled ordinary differential equations. For some energies, its motion is chaotic.

Sulfur Hexafluoride Is Significantly Denser Than Air Sulfur hexafluoride (also sulphur hexafluoride, SF6) is an inorganic substance, a heavy gas under normal conditions, which is 5 times heavier than air.

Sarrus Linkage The mechanism converts a limited circular motion into a rectilinear one without the use of guideways. It consists of several articulated rectangular plates, with two of them remaining parallel, but capable of moving toward each other.

The way a black hole twists space👆🏻 A black hole is a region within cosmos with so much gravity that it absorbs everything around it, including light. However, the word combination "black hole" itself is just a cleverly invented designation. And it only caught on due to the fact that it's convenient. A hole — because once something gets there, it cannot get back out. And the black one is that the object itself does not emit anything or practically nothing.

💦Acoustic levitation California startup Simplistyk has invented a device to levitate water. The device is called "Levizen". It applies the principle of acoustic levitation: high-frequency sound waves indistinguishable by the ear make a drop of water literally hang in the air.

🐍"The Pharaoh's Serpent" The euphonious name hides a collective image of multiple chemical reactions in the process of which there is a multiple increase in the volume of the used reagents. During the reaction, the resulting substance increases, and it (the substance) wriggles like a snake. What a fascinating sight!

Murmuration (from Latin murmuratio "muttering, buzzing") This is how ornithologists call the association of birds (commonly starlings) in huge flocks, continuously changing their shapes into a variety of figures. An impressive natural phenomenon!

Fluorescein When exposed to ultraviolet light, the green dye fluorescein emits light in the visible range, a phenomenon called fluorescence.

Chemical Chameleon (NaOH, KMnO4 and sucrose)

The aurora borealis (northern lights) is a phenomenon of glow of the upper layers within the Earth's atmosphere, caused by the movement of charged particles of the solar wind in the magnetic field of the planet. Excited oxygen atoms cause red and green glow. Purple and invisible to the eye infrared radiation is caused by ionized nitrogen molecules. Hydrogen atoms can be the source of a weak red glow.

Magic? No, physics! The Leidenfrost Effect ☝🏻 That’s a physical phenomenon in which a liquid closer to the surface, hotter than the boiling point of the liquid, creates an insulating vapor layer that prevents the liquid from boiling rapidly. Due to this "repulsive force," the droplet floats above the surface rather than making physical contact with the hot surface.