Euler’s number
The number e is a very mysterious constant. Unlike “pi,” it’s not at all obvious where it came from or what it actually means. And it’s far from clear what “magical” properties it possesses,...
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What is a logarithm
One of the most misunderstood mathematical operations is the logarithm. Why logarithms are needed, how and where they are used, almost no one knows. It seems like something boring and only needed by mathematicians....
Why does an airplane fly
Why does an airplane fly? The question might seem childish. But try to answer it, and there’s a high chance your answer will be incorrect. The truth is, the question is more complex than...
Square-Cube Law
There are things shown in movies that are impossible in the real world: giant walking robots, Godzilla, giant insects, Spider-Man, people with wings like angels… All of this is “prevented” by one interesting law,...
How a Jet Engine Works
When talking about jet engines, people usually mean gas turbine engines, like those used in airplanes. However, in reality, a jet engine can also refer to a rocket engine or a ship’s water jet....
Does Airplane Need a Tail?
Everyone has a tail: fish, birds, airplanes. Obviously, the tail unit, or “tail,” is needed for airplanes for the same reason as for birds—to control flight. But there are tailless aircraft, and they fly...
Stealth technology
In fact, it’s a very simple idea. But it has become so shrouded in myths that to most people it seems like something highly complex, secret, and mysterious. How does stealth technology actually work?...
Aircraft cruising speed
You’ve probably heard the term “cruising speed of an aircraft” many times. But have you ever wondered what it really means? Most people who use this term don’t actually understand its meaning. There’s a...
Maximum Helicopter Speed
The speed of a typical helicopter rarely exceeds 200–300 kilometers per hour. Even military helicopters, for which flight speed can be critically important, rarely accelerate above 350 kilometers per hour. It seems there’s a...
Discoveries of Archimedes
Archimedes is one of the most famous scientists not only of his era. Some of his discoveries and inventions were successfully applied by his contemporaries, while others were appreciated by humanity only hundreds or...
Squaring the Circle
There is one remarkable mathematical problem in history, which evolved from a simple mental exercise for the philosophers of ancient Greece into a very complex issue that had a significant impact on science on...
The History of Pi
This is the most famous irrational and transcendental number in the world. Even people who don’t know what it means and don’t remember what they were taught in school know that there is such...
