Some authors and writers spoke in their novels and books about some imaginary devices that later truly happened, some of these authors and writers are: Leonardo Da Vinci (1452 – 1519) Leonardo Da Vinci is a famous Italian painter; he was also an engineer, a geologist,a scientist, an anatomist , an architect, and a writer. …
In the year 1875, The English electric engineer Willoughby Smith (1828-1891) reached to the photoconductivity of the element selenium. Which led to the first photoelectric cells, as Smith discovered while using selenium in an experiment that the conductivity of the selenium decreases when illumunation is available. In the year 1876, Alexander Graham Bell (1847-1922) succeeded …
Most of the pencils are made from graphite with clay, some pencils are made from charcoal, others are made from carbon, and there is also the colored pencils and grease pencils. Most of the mixture are covered with a wooden binder, while some are covered with plastic. The great advantage in the pencil, which caused …
Calculations are an easy task for some people, but for the majority of people it is not that easy. The problem of counting has appeared when numbers appeared. The Abacus is considered a primitive calculator, the first abacus was the Sumerian abacus more than 4500 years ago. Then it was followed by the Egyptian abacus …
Leonardo di ser Piero da Vinci, known as Leonardo da Vinci was born in the year 1452 and died in the year 1519, he was born in Florence, Italy. Da Vinci is considered one of the great savants in many aspects. Leonardo’s father Ser Piero was a notary and his mother Caterina was a peasant …
The Great Pyramid of Giza which was built to be a tomb for the Pharaoh Khufu in order to be buried into it after the mummification of the corps. The Great Pyramid is considered one of the wonders of the Ancient World that are still existing. The discovery of the Pharaoh’ chamber in the pyramid …
Electromagnetism is one of the great powers that human use everyday in several uses. In the year 1812, Michael Faraday (1791-1867) the English chemist and physicist was able to reach for the fact of the electromagnetic field. In the year 1820, Hans Christian Ørsted (1777-1851) the Danish chemist and physicist was able to reach for …
Writing started first in order to cover the needs of human to register the victories of the rulers, record the colonies, keep the history and to transfer orders and information. The writing started first in the sort of pictures and signs on the caves thousands of years ago. Ancient people used to carve on stones, …
Engraving has been a popular form of decoration for thousands of years, but where did it all start? The first evidence of engraving is over 500,000 years old when people would carve stones and other hard objects to honour gods and leaders. Throughout history owning engraved goods has been a way to show wealth and …
Recycling may seem like a more modern concept to most people, but the truth is it’s been around for centuries. Advocates for recycling date back as far as 400 BC, with Plato as one of its early campaigners. In fact, archaeologists have discovered that during periods of time when resources were in short supply, there seems to …