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Woodpecker

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Aristotle can’t remain Ignorant!

Aristotle the great greek philosopher
The Greeks were a passionately curious lot. When Alexander the Great set off in 334 BC on the famous expedition that took him over the Hindukush into Tashkent and Kashmir, he was accompanied not only by navigators, guides and surveyors, but historians and philosophers as well.Alexander had been taught by the philosopher Aristotle, and we are told that he...

Why can’t the Sun melt Snow?

Why can’t the Sun melt Snow?
There are some things in nature that have a great capacity to toss back or reflect a great deal of the sun’s light that falls on them. One of them is snow. Newly formed snow reflects about 90 per cent of the sunlight that falls upon it. This means that the sun is powerless to melt clean snow. And...

The Earth takes a Battering

Hoba meteorite near Tsumeb, Namibia
During its life span, our planet has suffered the impact of close to 30 small planets, up to 10 miles in diameter and travelling 60 times the speed of sound. Each such impact releases about a thousand times as much energy as would be released if all the nuclear powers exploded all their present weapon stocks.About 5,000 giant meteorities...

Dropping Trees from the Sky – Hydroseeding

Agricultural aircraft are used for hydroseeding. Here an an agricultural aircraft, sometimes called a spray plane or crop duster, applies chemicals to a field of crops.
Finally there is a simple solution to the growing problems of deforestation and the greenhouse effect - dropping millions of trees out of an aircraft.The idea may sound bizarre but it has come from The Lockheed Martin Aerospace Company, USA. The company has proposed to transform equipments installed in huge C-130 military transport planes for laying carpets of landmines...

Tree Rings tell many Tales

Scientists can use ‘dendrochronology’ or the study of tree time, to learn about past climates by studying the patterns of very old trees.
Examining ancient trees helps scientists get an amazing picture of Earth's life, for trees are a record of their life time. By looking closely at the rings of a tree, scientists can not only tell how old it is; they can also tell you that in one summer in 1453 and again in 1601, there were freak cold spells.Tree...

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