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Who Discovered Angina Pectoris?

Who Discovered Angina Pectoris?
Also referred simply as angina, angina pectoris is a serious medical condition that affects many people all throughout the world. Patients usually experience severe pain in the chest area, mainly due to the lack of supply of oxygen to the heart muscle. Some of its common symptoms include pallor, vomiting and nausea. It is good to learn more about this serious medical condition including who discovered angina pectoris. The Discovery of Angina Pectoris Who discovered angina pectoris? The people living in 6th century B.C. India recorded and described the concept of heart pain first as part of ayurvedic medicine, which referred to angina pectoris. It was mentioned a number of times in the Sanskrit redaction text entitled the Sushruta Samhita. Additional Facts and Other Interesting Information Aside from chest discomfort, patients suffering from angina pectoris usually experience squeezing sensation, tightness and heaviness. Likewise, pain is very much felt in other body parts like...

Who Discovered Zero?

Who Discovered Zero?
Who discovered zero? Discovery of Zero We can’t say for sure who discovered zero before anyone else. But the oldest records of its use are found in the ruins of Babylonia in circa 300 BC. The Babylonians were the first to invent a place hold number system, that is the use of a number to “compress” and cycle figures for easier counting and representation. While our modern system uses 10 as its place value, they used the number 60. This is the sexigesimal system used when counting minutes and seconds today. Babylonian Use of Zero The Babylonians, however, only used zero as a place holder. In other words, it was to clarify representation of numbers in written form. The Babylonians used cuneiform symbols called wedges and crescents to stand for numbers. To avoid confusion with large numbers (for example, 40 X 40 + 1 versus 40 + 1), they invented a zero symbol to mean a blank, a break. But they did not quite think of zero as a number. Zero and the Mayan Calendar At about 400 AD, the Mayans...

Who Discovered Fractals?

Who Discovered Fractals?
Benoit Mandelbrot is usually credited with discovering fractals in 1975. Mandelbrot was the one who invented the word. He was also the first to represent them visually. But some facts about fractals were known to mathematicians as far back as the 17th century. Early Fractal Research A fractal can be described as a pattern that is repeated at every scale. It cannot be replicated by classical geometry. The concept of self similarity was first brought up by the philosopher and mathematician Lebinz in the 17th century. It wasn’t until 1872 before a function appropriate to be termed a fractal came into being. Karl Weierstrass showed an instance of a function that was continuous but could not be differentiated. This definition was improved upon by Helge von Koch in 1904 when he defined it as a Koch curve. A study of the facts about fractals will show it is now called the Koch snowflake. In 1915, Wallow Sierpinski created a triangle and a carpet. In 1938, Paul Levy came up with another fractal...

Who Discovered Melanoma?

Who Discovered Melanoma?
A type of skin cancer, melanoma is a medical condition marked by a malignant tumor of melanocytes. Aside from the skin, this disease also affects other important body parts, namely the eye and the bowel. It is one of the deadliest types of cancer, affecting almost 160,000 individuals each year in the United States alone. The World Health Organization reported that melanoma causes approximately 48,000 deaths annually all throughout the world. Aside from these interesting facts, it is also good to know certain things about the history of this disease including who discovered melanoma. The Discovery of Melanoma Who discovered melanoma? As a disease, a French physician named Rene Laennac first described melanoma. He reported it in 1804 as part of the Faculte de Medecine de Paris lecture that was held in France. He then published it in 1806 as a bulletin. In 1820, an English general practitioner named William Norris reported melanoma for the very first time in English. One of his notable works...

Who Discovered Medicine?

Who Discovered Medicine?
Introduction Medicine is universal to all mankind. It may even be found amongst animals. For example tigers and dogs eat grass when they have digestive problems. Because sickness is common to all, it is impossible to say that one person discovered medicine. Here we give a brief history of medicine in the ancient world. Oldest Discoveries in Medicine Like animals, primitive man used plants as medicine. Animals seem to know what is good for them when they are ill. It may be inherited or instinctive knowledge, or a little bit of both. With prehistoric man it was probably the same thing. Over time with much experimentation, people came to know more and more about the helpful plants around them. These herbs, fruits and vegetables were therefore the first medicine humans discovered. Discovery of Medicine in Egypt Herodotus in his Histories praised the ancient Egyptians as “the healthiest of people,” second only to Libyans. He ascribed this to good weather conditions and a sound health care...