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What you should know

Most of us already know: that an atom is the smallest division of matter that can take part in a chemical reaction; that a molecule is a structure of two or more atoms; and that life on Earth is based on organic molecules: defined as those molecules that contain carbon, often in combination with hydrogen, oxygen and nitrogen, and may include other elements like sodium, calcium, phosphorous and iron.  

Organic molecules can be extremely large.  Familiar extremely large organic molecules include plastics like polyethylene and many proteins, like spider web.

Chromosomes are structures within the cells of animals and plants consisting of very large molecules of  DNA (Deoxyribonucleic acid).   DNA stores and replicates information. It encodes the genes used by all complex living organisms on Earth to reproduce and function. 

 

 

Perhaps the most important physics discovery of my lifetime has finally been announced.  I say 'finally' as its existence has been predicted by the 'Standard Model' for a long time and I have already mentioned this possibility/probability in an earlier article on this website (link).

Its confirmation is important to everyone, not just to physicists working in the field of quantum mechanics.  Like the confirmation of the predictions of Einstein's Theory of Relativity we are now confronted with a new model of reality that has moved beyond an esoteric theory to the understanding that this is how the Universe actually is; at least as far as the Standard Model goes.


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Travel

Thailand

 

 

In October 2012 flew to India and Nepal with Thai International and so had stopovers in Bangkok in both directions. On our way we had a few days to have a look around.

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Fiction, Recollections & News

The Meaning of Death

 

 

 

 

 

 

'I was recently restored to life after being dead for several hours' 

The truth of this statement depends on the changing and surprisingly imprecise meaning of the word: 'dead'. 

Until the middle of last century a medical person may well have declared me dead.  I was definitely dead by the rules of the day.  I lacked most of the essential 'vital signs' of a living person and the technology that sustained me in their absence was not yet perfected. 

I was no longer breathing; I had no heartbeat; I was limp and unconscious; and I failed to respond to stimuli, like being cut open (as in a post mortem examination) and having my heart sliced into.  Until the middle of the 20th century the next course would have been to call an undertaker; say some comforting words then dispose of my corpse: perhaps at sea if I was travelling (that might be nice); or it in a box in the ground; or by feeding my low-ash coffin into a furnace then collect the dust to deposit or scatter somewhere.

But today we set little store by a pulse or breathing as arbiters of life.  No more listening for a heartbeat or holding a feather to the nose. Now we need to know about the state of the brain and central nervous system.  According to the BMA: '{death} is generally taken to mean the irreversible loss of capacity for consciousness combined with the irreversible loss of capacity to breathe'.  In other words, returning from death depends on the potential of our brain and central nervous system to recover from whatever trauma or disease assails us.

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Opinions and Philosophy

Australia's carbon tax

 

 

Well, the Gillard government has done it; they have announced the long awaited price on carbon.  But this time it's not the highly compromised CPRS previously announced by Kevin Rudd.  

Accusations of lying and broken promises aside, the problem of using a tax rather than the earlier proposed cap-and-trade mechanism is devising a means by which the revenue raised will be returned to stimulate investment in new non-carbon based energy. 

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