Unending Journey Of Pi

Pi has been known for almost 4000 years- but even if we calculate the number of seconds in those 4000 years and calculate pi to that number of places, we would still be approximating its actual value. It is very much rational to talk about this irrational number , which means its value cannot be expressed as a fraction m/n, where m and n are integers. Consequently , its decimal representation never ends or repeats . It is also a transcendental number number, which implies, among other things, that no finite sequence of algebraic operations on integers (powers, roots ,sums, etc. ) can be equal to its value.

Throughout the history of mathematics , there have been many efforts to determine Pi more accurately and understand its nature; fascination with the number has even carried over into non-mathematical culture. Pi was introduced by William Jones in 1706, use of Pi was popularized by Euler in 1737.

From them many have tried to find out the approximate the value of Pi, Babylonians(2000 BC), Egyptians (2000 BC) , Plotemy (200AD), Aryabhatta (500 AD) , Fibonacci ( 1220 AD) , Ferguson (1947), IBM 7090 (1961), David h. Bailey( 1986) , to even 29,360,111 decimal places.

Many countries celebrate pi day and Pi approximation day to commemorate the significance of the value of Pi. Pi day is celebrated on March 14. pi approximation day is observed on July 22. The first Pi day was held at San Francisco in 1988.

In India , However efforts to celebrate Pi Day are rarely seen.

Facts About Ozone

The molecular formula for ozone is O3. The unit of ozone gas is D.U. (1 D.U. = 0.01 mm). Ozone layer is found in the stratosphere. Ozone layer acts as a shield by absorbing harmful UV rays. Ozone is produced naturally by the action of sun's ultraviolet radiation on Oxygen. The ozone hole is formed by destruction of ozone molecules by manmade CFCs. The thinning of ozone layer was first discovered over the Antartica in the year 1985. World Ozone Day is observed on 16th Sept.

With rising ozone holes the people will be exposed to highly damaging UV rays which may cause skin cancer , blindness etc... So we,the people should put our best efforts to protect the ozone layer, otherwise world will not be a safe place to live in ..... If onions can make you cry , imagine what UV could be doing !!!!!!

My Face Is My Fortune

Has anyone wondered why facial hair has got reduced during evolution in the monkeys, further in the apes and more so in humans ? What has been the adoptive value of such a trait that has been favourably selected over time ? Darwin had some answers in his book 'The expression of Emotion in Men and Animals' ,published in 1872.

Obviously, expression are visible only in a hairless face. Further , an individual's identity status lies in his or her face and its distinctively unique features. Although the facial features are stamps of identity, there is something more than mere looks. What is it ? The answer lies in the fact that expression of emotions has evolved and improved with time as an effective means of communication..

This has happened even before language evolved to fortify communication. In those days there was only face to face communication.But from then to now there has been an amazing anatomical changes in the larynx, that is the hardware making vocalisation and phonation more refined, has been accompanied by the evolution of the software, the brain.

Over time , with increasing use of electronic means of communication rather than face-to-face interactions, will the course of evolution lead to course of stony-face humans ?

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