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Who Discovered Copper?

Who Discovered Copper?
Introduction Who discovered copper? Nobody knows. But evidence suggests that copper was the first metal ever discovered and used by man. Or at least one of the oldest. In modern day Iraq, archeologists once found a copper pendant over 10,000 years old. Unlike silver, copper is often found uncompounded in its natural state. So it is likely that humans learned to use copper first, perhaps along with gold and meteoritic iron. History of Copper Two of the world’s oldest civilizations made use of copper – Chaldea and Sumer. They used copper to make military equipment such as bows, arrows, spear heads and helmets. Archeologists have also unearthed small items like copper pins, harpoons blades and pots made of bronze (a copper alloy). Sumerian craftsmen made beautiful sculptures made from copper and mounted them on walls. The Imdugud Relief is a fine example of this. It dates from 3,100BC and shows an eagle with the head of a lion, holding a stag in each claw. Copper can be mixed with other...

Who Discovered Albinism?

Who Discovered Albinism?
Generally considered as a hypopigmentary congenital disorder, albinism is also called by other terms like achromatosis, achromasia or achromia. More than anything else, this condition is known for the insufficient melanin pigment that usually affects various body parts, specifically the hair, skin and eyes. Besides human beings, it also affects various kinds of animals including reptiles, birds and fishes. In order to learn more about this interesting medical condition, it is good to know other basic facts about it including who discovered albinism. The Discovery of Albinism Who discovered albinism? Despite the claims of earlier historians that Aulus Gellius and Plinius Secundus the Elder were the first individuals to have observed such condition, its discovery as a disease was credited to Archibald Garrod. He discovered the disease some time in 1908. He observed patients, particularly those with symptoms like hypersensitivity to light, eye misalignment as well as abnormal decussation. Additional...

Who Discovered Potassium?

Who Discovered Potassium?
The chemical element that bears the symbol K, potassium has an atomic mass of 39.0983 and an atomic number of 19. This alkali metal is soft and has a color of silvery white. It reacts to water and it oxidizes in air. Aside from this, the element can produce enough heat to burn evolved form of hydrogen. This element is commonly found in seawater as well as in ionic salt. Various fruits are also rich in this element. To know more about this important chemical element, it is best to start with the discovery of potassium. Historical Background Who discovered potassium? The alkali metal was discovered by Sir Humphry Davy in 1807 in England. The discovery of the element happened when he used electrolysis to process caustic potash. According to records, it is the first alkali metal to be discovered using electrolysis. At first, there are no distinctions between potassium and sodium. However, after the 18th century, Davy performed the technique once again and extracted sodium. At this time, he...

Who Discovered DNA?

Who Discovered DNA?
The story of who discovered Dna is a story of broken friendship that gave way to one of the greatest breakthroughs in Science. But it is a wonder what could have happened if the friendship had gone smoothly to the end. Linus Pauling Linus Pauling was a physical chemist who put forward a Dna model out of practical thinking that mathematical estimation in the 1950s. He was fascinated with Dna research. He would have been the man who discovered Dna if not for his aloofness from other English scientists. This kept him from being updated as other scientists were, like Watson and Crick. James Watson and Francis Crick The discovery of Dna or deoxyribonucleic acid happened when James Watson and Francis Crick were working together to find out the configuration hemoglobin. As they were doing so, they stumbled upon this particular acid cell. After much collaboration with other scientists, they were later credited with being the men who discovered Dna. Today, their names are associated with the discovery...

Who Discovered Gravity?

Who Discovered Gravity?
Gravity is the scientific term used to refer to the force exerted by a planet on objects nearby. This force is the one responsible for keeping the planets as well as the sun in their orbits. Gravity is also responsible for the development of tides. The force is important to keep high temperature in the stars’ interiors. In order to learn more about this concept, it is necessary to take a look at the history of the discovery of gravity. Read more VN:F [1.9.22_1171]please wait...Rating: 9.0/10 (11 votes cast)