Fun Science

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.

Interaction of bromine with aluminum Under normal conditions, bromine is a heavy red-brown liquid, the only liquid nonmetal. Bromine is poisonous with a pungent, unpleasant, suffocating smell. Bromine properties are similar to chlorine, but less active. It evaporates easily, forming brown vapor. Experiment: Pour some bromine into a flask. Drop a piece of aluminum foil into the flask. After a while the aluminum heats up and burns vigorously to form aluminum bromide.

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.

The Elephant Toothpaste Experiment in Motion Potassium iodide (a colorless crystalline salt) reacted so violently with hydrogen peroxide that it literally pushed the products of the chemical reaction out of the flask.

Magnetic levitation of aluminum, copper and magnesium💡 Magnetic levitation is a technology, a method of lifting an object using a magnetic field alone. Magnetic pressure is used to compensate the acceleration of free fall or any other accelerations

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.

Cellular Tropism This is the ability of cells to ensure the reproduction of certain viruses. It is determined by the complementarity (correspondence) of special cell receptors and virion antireceptors, as well as by the ability to implement other stages of virus reproduction.

How people lost their identity.. The photo shows a California prisoner, 1961, being prepared for a frontal lobotomy (amputation of part of the brain). The procedure was used to applied to people whose actions were considered immoral by society. This is how the state tried to control problematic groups, such as racial minorities and homosexuals.

Enormous achievement of 2021: The gene editor As in 2020, CRISPR-Cas9 genome editing technology was named among the major achievements. Why was it celebrated in 2021 as well? The fact is that, according to scientists, successful experiments on animals do not yet give a reason to apply the technology to humans. Here, the requirements are quite different. And yet this year such an operation was performed. With the help of CRISPR-Cas9 the gene causing a rare severe disease - transthyretin amyloidosis - was successfully edited for the first time. This work has been called a medical breakthrough. Another study by biologists is noted. They created hybrid human and macaque embryos that lived outside the body for up to 20 days. Such embryos are called chimeric ones. Scientists need them to study the early stages of human development, model the future course of diseases and study new drugs, and, in the future, to create potentially transplantable cells, tissues and organs.

A burnt match and a magnet Only those matches will be attracted that contain in their composition, the so-called iron minium — iron oxide (Fe₂O₃), which gives the match head its characteristic dark red color.

Demonstration of the incredible Coanda effect with the example of a ball that does not fall as it 'sticks' to the lower part of the air stream. Physics is a kind of magic indeed!

​​Heimlich Method ☝🏻This technique can save a person who is choking and suffocating. When performing abdominal thrusts, the lifesaver stands behind the patient and puts pressure on the lower part of the diaphragm with his hands. This compresses the lungs and puts pressure on any object lodged in the trachea and usually pushes it out.

Solar-Powered Levitating Engine Levitation is overcoming gravitation, when a subject or object floats in space (levitates) without touching the surface of a solid or liquid support. For levitation it is necessary to have a force that compensates the force of gravity. The sources of such forces can be gas jets, strong sound vibrations, laser beams, etc. Diamagnetic levitation and the possibility of levitation due to the Meissner effect have also been scientifically discovered and experimentally proven.