What is lead and where is it used?
Lead (Latin for plumbum) is a chemical element, a metal with atomic number 82. In its pure form,...
Why is the milk white? Where does that color come from?
Milk is one of the most nutritious and valuable products, and not only cow’s milk but also goat’s,...
Food for pleasure: foods that lift your spirits
Tasty and healthy food can be a great remedy for both body and mind. Here is a list...
Harmful and beneficial properties of chicken eggs
Fried or boiled eggs are one of the most favorite dishes for breakfast or dinner, and they are...
Why are there Arabic numerals in China?
Two people who speak different languages can hardly understand each other. And only with numbers, there is usually...
Why did miners use to take canaries with them to the mine?
Very often, reading a fascinating book, we are surprised by how rich and fanciful the imagination of the...
History of Magical Illusions and Tricks
Magic illusions have existed for centuries. This performing art has been called magic. But it is not the...
Why pirates wore a patch over one eye
In the early 18th century, the Caribbean Sea was a veritable haven for pirates. In this lawless place,...
History of condoms – when they appeared and who invented them
The first condoms were invented over a thousand years ago. However, contraception did not only protect against pregnancy...
How to stop being a wimp and learn to say “no”
If you sometimes regret agreeing to help someone or suspect that others are exploiting your kindness, it means...