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Pitch, a highly viscous material derived from tar which behaves as a very slow flowing fluid at room temperature. The viscosity of pitch is about 230 billion times that of water. At a first glance, pitch looks like brittle solid which can be shattered by hammer but as a matter of fact, it is a very thick fluid even at room temperature. In 1927, Professor Thomas Parnell of university of Queensland in Australia, started an experiment to illustrate the liquidity of pitch. He took a sample of heated pitch and poured in to a sealed funnel and allowed it to settle for 3 years. Then in 1930, the seal from funnel was taken off and pitch was allowed to flow. A transparent bell jar covers the funnel and beaker. The first drop fell after 8 years in December 1938. And till today, only 9 drops have fallen. The last and 9th drop fell in April 2014. The next drop is expected to fall sometime in next decade. Initially, the experiment was not conducted under any special...

                                                                           Image Source- MaxPixel If you love to stare at night sky, star and planet then this is going to be your golden month. The rare celestial phenomenon like longest lunar eclipse of the century and mars closest approach to the earth are going to happen in July 2018. Lunar Eclipse The total lunar eclipse will take place on the night of July 27, 2018. It is expected to be the longest lunar eclipse since last 100 years. The moon will be covered by earth's dark shadow, known as 'The Umbra'. The moon will appear in reddish color, better known as 'Blood Moon'. Timing of total lunar eclipse in India As per reports, whole event will start from 23:44 on July 27 and will end at 04:58 of July 28. The penumbral eclipse wil...

A cup of hot tea or coffee which kickoff the day for most of the people across the globe. It is common known beverages. China and India are the lead producers of tea where as Brazil and Vietnam are the key producers of coffee. In general, we take tea or coffee because it helps to reduce sleepness and make brain sharp so that we can work effectively. But ever wonder how they act as CNS stimulants and how it reduce drowsiness or sleepness ? If yes then here is how it works. Constituents in Tea and Coffee Generally, tea or coffee contains methylxanthines (a group of alkaloid) like caffeine, theophylline and theobromine. Nuts of cocoa plants also contains caffeine, present in cola flavored drinks. A cup of hot coffee contain about 100-200 mg of caffeine while a cup of hot tea contain approx 25-50 mg caffeine. Caffeine and Theophylline They both have very similar kind of CNS stimulant effect. Humans can experience reduction in fatigue, leading to sleeplessness, i...