Fun Science

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!

Skydiver & Raindrop An increase in the resistance to motion along with an increase in velocity causes a steady, regular motion of a body as it falls from a great height in a liquid or gas (e.g. in the atmosphere). Thus, a skydiver can gain speed up to 50 m/s before opening the parachute, and raindrops, depending on their size, reach speeds from 2 to 7 m/s.

Paper airplane and aerodynamics.

People: "All these robots are harmless, the battery runs down in five minutes, why be afraid of them?" Scientists: "The bipedal robot ran five kilometers for the first time – it took 53 minutes and one battery charge to do it" 🤖😳 The Cassie robot was created by students at Oregon State University with one million dollars in grants from the Defense Advanced Research Projects Agency (DARPA) in 2017. The bipedal robot is controlled by a neural network using deep machine learning with reinforcement.

How to make the simplest unipolar motor

Such a beauty appears if you water the screw with ferromagnetic liquid (it is strongly polarizing in the presence of a magnetic field liquid, which contains ferromagnetic nanoparticles).

Barium Sulfate Used In LEGO Parts If a child swallows a LEGO part, it will be visible on an X-ray due to this compound. However, sulfate was abandoned in 1996 as it made the plastic brittle.

The Engine In The 2 Human Powers 😅 This idea does not seem to be a genius idea.

Here is a collection of real elements from the Mendeleev’s Periodic Table! Wonder about how airtight this thing is... After all, it contains elements that can be harmful to a person.

Static Discharge Imagine the situation; someone invites you to visit. You come to the door on time, wipe your feet on the mat thoroughly, then touch the brass door handle... and that's when you feel a slight impact. It's a static discharge. Why does this happen? After you had wiped your feet on the mat, your body received a negative electrical charge. Then you touched a negatively charged hand to a positively charged metal object (a door handle in our case) and the electrons transferred from your hand to that object. Such an instantaneous transfer of electrons is called a static discharge. It was precisely at the moment you felt a slight electric shock.

How knowledge of physics and a simple tension on the threads can "break gravity".

CyberDog: Xiaomi First Robotic Dog Does your dog know how to do a backflip? 🤖 Well, Xiaomi dog can. Jetson Xavier NX module from Nvidia, containing 384 CUDA cores, 48 tensor cores, six Carmel processors and two specialized deep learning cores, became the computing center of the robot. The module collects and processes information from 11 sensors. It uses specially designed Xiaomi servos to move, enabling it not only to walk, but also to do backflips and other tricks. In fact, the machine moves at 3.2 meters per second and weighs 3 kilograms. Xiaomi reports that the robot can follow its owner like a real dog. The device also recognizes faces. By the way, the CyberDog can be controlled by voice or through a smartphone app. What do you think, whether the robot is capable of fully replacing a real animal?