Fun Science

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

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.

Neural Network Training Autopilots and realistic simulators require data that you have to collect manually, which is an extremely long and time-consuming process. For this purpose, you can use machine learning today! Here is an interesting project: DriveGAN – a neural network is trained on hundreds of hours of travel video from the real world, and then allows you to "synthesize" new data, such as pseudo-travel, weather conditions, time of day, etc. Besides the fact that the generation itself looks better than the previous one, it is also possible to control the simulation as well, turn somewhere and change the speed.

Hand-Made Lava Lamp Use sunflower oil, add water and some dye. Mix baking soda and citric acid. Add to our liquid and watch the beautiful bubbles. #experiments

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#SubscriberQuestions Why is there double pane glass in windows? We know that heat is transferred from a hotter body to a cooler one. However, various materials show different abilities to transfer heat, or different thermal conductivities. For example, wood, glass and water have extremely low thermal conductivity. Windows are made of two or more panes of glass bonded together to increase their thermal insulation properties. The space between the panes is filled with air, the thermal conductivity of which is 40 times lower than that of glass. The typical "glass-air-glass" window design allows us to better keep our homes warm. In some cases, other gases with even lower thermal conductivity serve as a substitute for air in window construction.

Japanese Mathematician Kokichi Sugihara's Optical Illusion Sugihara showed the difference between reality and its reflection in the mirror. A variety of geometric shapes are placed in front of the mirror where we see a completely different figure in the reflection. A circle turns into a square and vice versa.

The Sixth Finger You've probably already seen the "Sixth Finger" that you can 3D-print and hang on your hand? There' s an interesting study on this: Scientists trained a group of people to use this device (while allowing them to take it home from the lab) and came to these conclusions: - After a while, the brain perceives the extra finger as a full-fledged part of the body - Participants learned to do many tasks with one hand that required two hands - This is a promising research area as such "augmentations" will give surgeons or other workers the ability of doing more work with one hand!

Jet Propulsion Jet propulsion is based on the law of conservation of momentum. It arises when a part of a body separates from it with a certain velocity. For example, if you inflate a rubber balloon, both its speed and the wind speed are equal to zero, so the momentum becomes equal to zero as well. If you let the balloon go without tying it up, the air will start to come out of it in one direction, and the balloon itself will fly in the opposite side. 🚀The same principle applies to rockets and firearms as well.

Ubiquitous Energy – Solar Windows American company Ubiquitous Energy has developed technology that enables you to turn any glass surface into a solar panel. According to the new technology, a special organic coating of 0.001 mm is applied to the glass. It captures ultraviolet and infrared radiation, converting it into electricity, while the visible part of the spectrum passes quietly through. The developers emphasize the possibility of creating a hybrid of a simple window and a solar panel, providing homes with electricity.

No big deal, just a man in a drone flying through Times Square. Is the future already here? 🤔

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.

💦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)