Bulletproof jackets were being manufactured with ballistic nylon material till the 1970s. In 1965, a compound — poly- parphenyleneterephthalamide – was invented with the brand name Kevlar. This is a liquid polymer which can be spun into fibre and woven into cloth. Kevlar was developed for tyres and, later, for ropes, gaskets and various parts of planes and boats. The …

Surprice! It’s a steel ball! When a steel ball hits a hard surface, like the ground, it dents just like a rubber ball. But the steel snaps back into shape much faster than a rubber ball. It is the snapping back into shape that makes any ball bounce, so since the steel ball snaps back into shape faster than a …

Kenichi Ohmae is one of the world’s leading business and corporate strategists. He is known as Mr Strategy and has developed the 3C’s Model. For a period of twenty-three years, Ohmae was a senior partner in McKinsey & Company, Inc., the international management consulting firm. As a co-founder of its strategic management practice, he has served companies in a wide …

How many times have you been told not to read in bed and how often have you been ticked off for reading in poor light? Probably quite a few times if you are an avid book-worm. Now you can cast away your small flashlights and get rid of your reading lamp, for there are specially designed books that create their …

It is probably sate to say that some of the largest animals that have ever lived on the surface of this planet are members of group of animals which have been collectively called dinosaurs. These ‘terrible reptiles’, as their name means, have excited the imagination of men ever since bones of the first dinosaur were discovered in rocks of Upper …

In this question, the word ‘danger’ does not refer to the danger to which individuals of any species may be subjected. Danger in this case means the danger to which a whole species is liable. In other words, species may be in danger of becoming extinct, and disappearing for ever from the face of the planet. Of course, we can …

In contrast to the acrobatic antics of the monkeys and apes, sloths move about the tree tops in very slow motion. They hang underneath the branches from hooked claws of both the fingers and toes, and spend most of their lives in this upside down position. They eat, sleep, mate and even give birth to their young upside down. There …

Some readers may think that this the easiest question in the book. Surely everyone knows that the answer is Mount Everest, which rises 8,848 m (29,028 ft) above sea level! But what about mountains that rise from the sea floor? If you take them into account, then Mauna Kea, Hawaii, is 1,355 m (4,446 ft) higher than Everest. Mauna Kea, …

Kelly Holmes (born: April 19, 1970) is a British middle distance athlete. Regarded as the best female middle distance runner Great Britain has ever produced, she won gold medals in the 800 metres and the 1,500 metres at the 2004 Summer Olympics. Early Life and Army Career Holmes was born in Pembury, Kent, the mixed-race daughter of Derrick Holmes, Jamaican-born …

The baobab tree is to be found in tropical Africa. It is a most strange-looking tree. Its barrel-like trunk can reach 30 feet or more in diameter, although its height is not proportionately great. It is a large gourd-like, woody, fruit containing a pleasant, cool tasting juice. A strong fibre obtained from the bark is used in Africa to make …