A gelotologist is a specialist who studies the physiological effects of laughter. When a person laughs, some special muscles called gelastic muscles get exercised, and, as a result, several physiological changes such as an increase in respiration and blood circulation take place. A gelotologist is concerned with analysis of such changes and their effect on human health. The word originated …

Whitcomb L. Judson invented the zipper and YKK is the Japanese company that makes them. Whitcomb L. Judson was a lover of gadgets and machines and the idea for his “clasp locker” came from when a friend had a stiff back from trying to fasten his shoes. Judson’s clasp locker was used mostly on mailbags, tobacco pouches and shoes. However, …

Muni Pulak Sagar Ji — A divine soul was born, in a very small but fortunate, Dhamtri village in Chattisgarh; this soul was none other than Muni Pulak Sagar Ji Maharaj. His birth brought happiness, wealth, respect and peace in the house of Shri. Bhikamchand Ji and Smt. Gopi Bai Jain, parents of this child. His name before Deeksha was …

एक नदी में एक मोटा – सा, हरे रंग का मेंढक था। मेंढक अपनी जिंदगी से खुश और संतुष्ट था। एक बार दुर्भायवर्ष वह नदी से निकलकर, नर्म – नर्म धुप का मजा लेने के लिए किनारे पर आ बैठा। तभी एक काले कौए ने उसे झपटकर अपनी चोंच में पकड़ लिया। “वाह!” क्या स्वादिष्ट भोजन हाथ लगा,” मेंढक को …

Galileo, the Italian scientist, invented the thermometer in 1593. At that time, however, it was used to measure pressure changes in relation to weather predictions, rather than to take a human temperature!

The history of writing instruments with which humans have recorded and conveyed thoughts, feelings and grocery lists, is the history of civilisation itself. This is how we know about our ancestors and their lives. The handy sharpened-stone, used for skinning and killing animals was adapted into the first writing instrument. Around 24,000 BC, the cave man started drawing pictures with …

Mukta Gupta — Born on 28th June, 1961, did her schooling from Montfort School. After completing graduation in (B.Sc. Zoology Hons.) from Hindu College, Delhi University in 1980, did L.L.B from Campus Law Centre in 1983. Was enrolled with the Delhi Bar Council as an advocate in the year 1984. Practicing as a lawyer, has conducted cases on civil, criminal, …

A pen drive is another term for USB (Universal Serial Bus) flash drive and is basically a data storage device. The pen drive was invented in 1998 by IBM, with the intention of replacing the floppy drive in its ThinkPad line of products. The first flash drive was manufactured by M-systems under contract with IBM and was called the disgo. …

From earlier times, in all parts of the world, people have made fire by rubbing a hard stick against a soft stick so that soft flakes of wood, sloughed off by the hard stick, stick started to smoulder. Another way was to use flint, a very hard stone, striking it against a lump of iron to produce sparks. Until the …

Sir James Dewar, in the year 1892. It consists of a double-walled flask with a vacuum between the walls. The walls are silvered and heat cannot be conducted across a vacuum. They keep hot liquids hot because the heat cannot get out and cold liquids cold because heat cannot get in. After the liquid has been poured in, a cork …