Who invented toothpaste?

When was toothpaste invented? The earliest dentists known are the Egyptians. 5000 years BC they managed to produce toothpaste in powder form. The powder consisted of abrasives such as crushed beef heads, pum...
Shark is the 12. most dangerous animal in the world

Most dangerous animal in the world

What is the most dangerous animal in the world? At the top of our list of "the most dangerous animals in the world" we have Mosquitos which causes 2-3 million deaths a year . Then comes venomous snakes which  ...

History of Money

When was the money first used? Who invented money? Money is such an integral part of our everyday life that it is impossible to imagine us  without money.  However, in the very old days, people did not have ...

Is the Earth getting warmer?

You often hear about rising temperatures on Earth. But is there a scientific basis for that? And what would be the consequences of global warming? There is no doubt that the Earth is getting warmer. The Cl...

How does an x-ray work?

What is X-Ray? An X-ray device is basically a camera. But unlike an ordinary camera where visible light exposes the film, an X-ray uses x-rays instead. X-rays are like visible light waves  like visible lig...
Weather and climate have totally different meanings. So what is the difference?

What’s the difference between Weather and Climate?

Weather is the specific day-to-day conditions of the atmosphere at a particular place and time. It describes the state of the atmosphere with regard to meteorological conditions (variables) such as; wind (s...

Who found the first dinosaur fossil?

When was the first fossil of a dinosaur found and who found it? It is not known exactly when the first dinosaur fossil was found by humans. >> 5 things you did not know about dinosaurs! << ...
Velociraptors size was equal to a turkey

5 Dinosaur Facts You Haven’t Heard Before

5 surprising facts about dinosaurs Our perception of dinosaurs is largely colored by movies like Jurassic Park and the small plastic toys we played as children. But did you know that T-Rex was actually bearing...

Why do we have seasons?

Why do we have different seasons on the northern and southern hemisphere, and what is the explanation for why we have seasons? Distance to the Sun does not determine seasons. Seasons change is connected with ...

Why do we get under eye bags?

Older people often have bags under their eyes. Also young people can get them if they have slept badly. What is the reason for under eye bags? If you are tired, for example after a really bad night's sleep, ...