Tag Archives: atmosphere

Think – Today: Why Do We Have A 24-Hour Day?

by Anura Guruge


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sundialWhy 24? Why wasn’t it 20? Have you ever wondered? Pretty important to our lives. Most of us are slaves to time, but we are so busy that we never get a chance to think as to how time, as we know it, came to be.


Think first, then research, then THINK again. Think for the pleasure of thinking.


Yesterday’s ‘Think’: “Changes in the composition of the atmosphere” — 99% of our current atmosphere is made up of two gases: Nitrogen (78%) & Oxygen (21%). All the other gases, including the Carbon Dioxide (that gets talked about so much in the context of climate change), fall within the remaining 1%! Carbon Dioxide, right now, only accounts for about 0.037%. As far as scientists have been able to determine, this 99% Nitrogen/Oxygen composition, possibly with some ‘small’ variations, has been around for the last 200 million years! WOW. In the ‘early days’ and we are talking maybe a billion years ago there was much more Carbon Dioxide and considerably less oxygen. Photosynthesis by plants, where they absorb Carbon Dioxide and release oxygen, was a factor in changing the composition of the atmosphere.


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by Anura Guruge

Think – Today: Has The Makeup Of Our Atmosphere Changed Over Time?

by Anura Guruge


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2000px-atmosphere3-svgYes, you hear about the greenhouse gases, lead (from when we used leaded gas/petrol) etc., in our atmosphere. But, have you given any thought to whether the makeup of our atmosphere has changed, significantly, over the years. It is something worth thinking about. The atmosphere is pretty vital to our life. Right?


Think first, then research, then THINK again. Think for the pleasure of thinking.


Yesterday’s ‘Think’: “Fidel Castro and the nine days of mourning” — nine consecutive days of mourning, novendiale (or novemdiales) in Italian, is a very old Catholic custom that used to be regularly practiced upon the death of nobles. Typically a Catholic Mass is held on each of the nine days. These days you typically only hear about novendiale upon the death of a pope. That this Catholic tradition is being used with Castro is intriguing. Though born a Catholic he has claimed that he was a non-believer. He, however, made a point of meeting popes. As far as we know there are no official Catholic church ceremonies associated with his funeral.


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by Anura Guruge