Index Home Postage stamp was a British innovation. First introduced on 6th May 1840, it was a beginning for pre-paid postage, we still follow world-wide. Since then British postage stamps have…
Home Index Two ubiquitous child-survival tools, oral rehydration solutions (ORS) and growth charts, are less than 50 years old. Both of these tools are simple, intuitive, and logical. In the 1980s,…
Home Index Have you ever wondered about old baby-food advertisements. In these advertisements, we could see healthy-chubby infants and happy composed mothers. Once frequent on television and in print media, these…
Index Home All living beings react to their environment. Barring a few, all animals can see, hear, feel, smell and taste our surroundings. We all can also walk, jump, balance and…
Index Home It just happened one day Scientists were beginning to discover existence of invisible rays towards the end of 19th century. Physicists of the day, Humphry Davy, Micheal Faraday, Hemholtz…
Index Home Emergence of a microscope Origin of microscope is shrouded in controversy. Various traders and workmen used lens for magnification as early as 12th-13th centuries. However, it would take four…
Index Home Journey of surgery till the Middle Ages Mankind has been affected with wounds, fractures, and outgrowths since antiquity. Various applicants to heal wounds and fractures have included honey, clay,…
Index Home Listening the unseen Two exciting developments took place in early 19th century. Around 1750s Leopold Auenbrugger invented percussion, and in 1816 Laennec invented stethoscope, and thus auscultation. Leopold also…