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Written by Dr. H. P. Bustami
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Sunday, 01 June 2008 |
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Modern europeans stem from a very small founder population which some 50.000 years ago consisted of just a small clan which than in the following ten thousands of years developed into what we know today as european peoples. This finding is indeed not new and has been proved by numerous genetic studies on haplotypes which are a clear genealogical measurement of where and when people came to which place.
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Written by Thomas Hesselberg
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Wednesday, 07 May 2008 |
Most of us spend about 7-9 hours of the day in a passive state of unconsciousness. Why do we humans have to ‘waste’ around a third of our lives doing absolutely nothing? This time could surely be better used for something else. However, like everything else in the world that surrounds us, sleep has been subjected to evolutionary forces, so since it is observed universally among animals, its advantages must outweigh the costs of less time available for food and mate searching. We know from ourselves that we definitely need sleep, without it, we become drowsy and our mental and motor faculties lose efficiency. With prolonged sleep deprivation we start to hallucinate and lose grasp of reality. The same effects are seen in animals. However, science cannot yet completely solved the mystery of we have to sleep. In a recent review paper, Emmanuel Mignot from the Howard Hughes Medical Institute looks closer at the hypotheses for why we sleep.
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Written by Thomas Hesselberg
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Thursday, 24 April 2008 |
The evolutionary arms race between parasites and their hosts have been ongoing, almost since the first organisms appeared on Earth. The development of hosts defences including immune, chemical and behavioural defences have forced parasites to develop more and more advanced counter-measures. Some of the most impressive outcomes include parasites, which can affect and control the behaviour and physiology of their hosts. A new addition including a parasitic nematode and an ant has recently been described by scientists from the University of Copenhagen, Denmark.
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Written by Dr. H. P. Bustami
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Friday, 02 November 2007 |
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Written by Dr. H. P. Bustami
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Thursday, 25 October 2007 |
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 Snail modelizing its wormgearbox. Courtesy, C. Allgaier, University Tuebingen, Germany)
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