The discovery of Teflon, a polymer chemically known as polytetrafluoroethylene (PTFE), was sheer coincidence, and yet a revolutionary one. The man behind the discovery was an American chemist named Dr Roy J. Plunkett (1910–1994), who was then working for DuPont, an American chemical company. In the year 1938, Dr Plunkett was conducting a coolant gas…
The science and study of laughter is called Gelotology. The term originates from the Greek word gelos, which means laughter. Gelotology studies how laughing can affect human body and mind. Gelotology was founded by William Finley Fry, Jr. (1924–2014), a former Associate Professor at Stanford University. He went on to found the International Society of Humor…
Polar bears are clad with thick, waterproof fur and their feet are partly-webbed. It is these features that make them strong swimmers. Their fur and feet help them to swim long distances through the icy waters of the Arctic.
About 1,000 movies are produced in India every year, most of which are produced in Mumbai (called Bollywood), as compared to Hollywood which makes around 600 films annually. Movies of other regional languages are produced mostly in their respective states. Movies made in the languages Tamil, Telugu, Marathi, Bengali, etc. among others have gained recognition both within and outside their domains.
Toronto, Canada, was the first city in the world with a computerized traffic signal system. In 1963, the traffic signals in city were computerized. Today Toronto has around 2,300 sets of traffic signals, all managed by a centralized control system.
Colour-blindness, also known as colour vision deficiency, is the inability of the human eye to see or differentiate between colours. This optical condition, which is mostly genetic, occurs due to a fault in the development of cone cells present in the eye. Cone cells and rod cells, present in the retinal section, ensure colour vision and night…
