Necks

... citing a evolutionary psychology research on flirting and human sexuality. The broadcaster claimed, among other things, that women extend their necks when they are flirting with men on the basis that it is a submissive position. They note wolves as another mammal in which this behavior is observable. ...

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I dont quite think that the evolution of giraffes necks occured at 5 mm per generation otherwise their necks would be far longer than they are now and also because evolution works on genetic variation and mutation (amongst a few other things), so ...

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... According to Lamarck, giraffes in the long past had short neck. however, they want to eat leaves from high trees, so they have to evolve their necks longer. Each generation, their neck got a little longer, for example, 5 mm. Remember, Lamarck believe that evolution is a very long progress. ...

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One cannot say so, really. Lamarckism was a theory that tried to explain how giraffes got their long necks (by inheriting achieved traits), but it turned out Lamarck got his idea wrong. However, Jean-Baptiste might find some comfort from the today's discovery of epigenetics, ...

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... the brain, you can reduce it by mechanical means once the arteries become blocked. Many elderly folk are aware of giddiness if they extend their necks, temporarily cutting off blood flow to the cerebellum with inadequate supply from the other vessels through the Circle of Willis. Major cerebral ...

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