Tweet More than 3500 years ago the Ancient Egyptians were the first to discover the breast cancer that was visible by eye unlike the other types of cancer. The breast tumors were treated by cauterization, which was not successful and led to a lot of death for breast cancer patients. In the 16th century, The [...]
Tweet The magnetic compass determine the north, south, east and west directions using a magnet pointer. The north and south directions in the magnetic compass are parallel to the north and south directions of the earth. The magnetic compass was first invented by the ancient Chinese around 2000 years ago, it was used in geomancy [...]
Tweet The highest waterfall in the world is Angel Falls in Venezuela. Its height reaches 979 meters. It was discovered in the year 1935 by the American Jimmy Angel born in 1899. He noticed the falls while flying over the Mount Roraima. The deepest lake in the world is the Lake Baikal in Siberia, Russia. [...]
Tweet The planets can be classified to two parts the first is the 4 inner planets that are composed from rocks and metals and they are Mercury, Venus, Earth and Mars. The other part is the 4 outer planets which are different in the composition, where Jupiter and Saturn consist of hydrogen and helium, while [...]
Tweet Coal is a kind of sedimentary rocks that can be easily combusted. The coal is typically found in layers that was formed hundreds of millions years ago, from buried forests in the presence of high temperature and pressure the . Coal is composed from hydrogen, oxygen, sulfur and nitrogen combined with the main component [...]
Tweet The artificial pacemaker is the device which controls the heart beats in order to help the patients who have cardiac problems. The idea appeared first in the year 1899, by the British J.A. McWilliam when he discovered that an electrical impulse can affect the heart by controlling the ventricular contractions reaching 60 or 70 [...]
Tweet Our Solar System is composed from the sun along with the planets Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. The Solar System has been formed about 4.6 billion years ago, the sun equals about 98-99% of the Solar System mass while the mass of the 8 planets that orbit around the sun equals [...]
Tweet X-rays (X-radiation) are shorter in the wavelength ultraviolet and longer in wavelength than the gamma rays. In the year 1895, Wilhelm Röntgen (1845-1923) the German physicist noticed that there were unknown rays when he was working on his lab with a cathode radiation tube. Wilhelm Röntgen was awarded the first Nobel prize in physics [...]
Tweet The first trial of manufacturing a flight machine was made by the Greek Archytas in the beginning of the 5th century B.C., he tried to fly a bird shape model using steam power. In the 9th century, the first trial of flying was by Abbas Ibn Firnas (810–887) the Arabic physician, engineer, and inventor [...]
Tweet Diabetes is a chronic disease where the patient suffers a high percentage of sugar in the blood. The main symptoms of the diabetes are recurrent urination and increasing thirst and hunger. Diabetes can be classified to 3 main types according to its causes and some other types which are not so common. *Type 1 [...]