How to know if it is real gold; Types of gold according to carats

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Gold is one of the most common precious metals and is used mainly to make all kinds of jewelry. It is a soft, yellow, bright and malleable metal that does not react with almost any...

How do optical illusions work?

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The optical illusions raise many questions about our brain and its functioning. A phenomenon that arouses the curiosity and amazement of all of us and that seems like a thing of magic, but that has a logical explanation and...

Epidemic, endemic and pandemic: differences and characteristics

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When a new virus appears that threatens to endanger the health of society, we hear certain words that are always repeated in the speeches of health professionals. Pandemic, epidemic and endemic are three of these...

Earthquakes: what are they, types, causes and consequences?

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Everyone has the image of an earthquake in mind. We have seen them in the movies and on television, where they have found their way through fiction or on news channels when they take place...

6 consequences of water pollution

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Water is one of the most important natural resources of all. In fact, not only life in all its forms on our planet depends on water, but also much of human activity, from agriculture and...

Why do I have the feeling that I have experienced this before.

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Surely you have also noticed that strange sensation in the middle of a conversation, when arriving at a new place or taking a walk and suddenly thinking: "I have already lived this". Although you are...

Why did the dinosaurs go extinct?

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Thanks to archaeological excavations we have been able to discover what inhabited our world before the arrival of mammals and, therefore, the human race. Dinosaurs were the species that populated the planet Earth that was part...

What is the difference between animal and plant cell?

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The smallest living matter that is part of a living being is the cell, a component that, by itself, is capable of performing all the basic functions of a living being: breathing, producing energy,...

What if the earth stopped spinning?

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Measured from the equator, our planet rotates at a rate of 465 meters every second. Faced with such speed, have you ever wondered what would happen if it suddenly stopped spinning? What would happen if suddenly...

What are estrogens for?

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The estrogen is the female hormone that regulates sexual function of women but additionally also influences other physical processes such as metabolism or bone health. During menstruation there is a significant drop in estrogen production and, therefore,...

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