Categoría Oddities

How to save a drowning person?

The scene calls for quick action: someone struggles in the water and starts screaming for help. If there are no lifeguards around, it may be up to you to attempt rescue. In such a situation, it is not enough just…

How do molluscs form their shells?

»> Molluscs are invertebrate animals (without a backbone) that have a soft body – molluscus, in Latin, means exactly “soft”. Most of them are equipped with a calcareous shell formed from a kind of skin that covers the body of…

Is there really quicksand?

There is, but not like in the old Tarzan movies. This type of terrain can even trap an animal, but seeing a person being swallowed, only in the cinema. In addition to being difficult to find a very deep quagmire,…

What was the Great Depression?

It was the most serious global economic crisis of the 20th century. It all started because of a major imbalance in the US economy. During the 1920s, there was a rapid growth of the stock market in the country, with…