Water evaporates from oceans, seas, rivers, etc., and rises up in the atmosphere. At the height of several thousand kilometres, these vapours condense to form clouds and eventually droplets. By this time, the droplet may have travelled many miles from its place of origin. Once the droplets reach a certain size, typically 6 mm in diameter,…
Hero of Alexandria was a mathematician and an engineer about the time of Christ in the 1st century AD. He built a machine that could dispense holy water by accepting a coin. This was the world’s first vending machine. Its internal structure comprised essentially of levers resembling a balance beam. On one end of the beam,…
The e-mail predates the Internet or the World Wide Web by more than a decade. The e-mail originated in the research labs of the United States Defence Labs in the late 1960s, in the ARPANET project. It was used as a note or a file that was transferred from one user’s folder to another user’s…
Lord Byron, also known as George Gordon Byron and 6th Baron Byron, was a famous English poet. He was known to enjoy adventure. He was extremely fond of exercise and sports. He loved swimming and once swam from Sestos in Modern Gallipoli in European Turkey to Abydos in Upper Egypt. He mastered a wide variety of…
The fax machine was invented by a Scottish inventor Alexander Bain in 1843. He devised an apparatus comprising two pins that were connected to two pendulums through five wires. When an electric signal was sent from the transmitting end, the receiving end was able to reproduce the signal on an electrochemically sensitive paper impregnated with chemicals….
Gallium is a soft and brittle metal which is found in bauxite or zinc ores. It melts at 29.7 degrees celsius, which is about room temperature. In fact, if you hold Gallium in your hand, it will melt. Gallium is mostly used in microwave technology.
