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quote:Originally posted by chrisBabies are born with lines on their palms, yet no wrinkles on their faces. Unless they do a lot of hand-wringing, but no smiling or frowning in-utero, then repetitive hand folding cannot be the mechanism !Seriously, babies affected by Down's Syndrome (Trisomy 21) characteristically have only a single palmar crease. The cause / significance of this observation is unknown.Chris"I never forget a face, but in your case I'll make an exception" - Groucho Marx
With regard to palmistry, as Chris has mentioned, people with Down's syndrome (and many other congenital conditions) have all sorts of small corollary differences in their body, including (but not limited to) shapes and position of ears, and changes in lines on their hands. This is because as the embryo develops, lots of different changes are happening in the various different parts of the embryo, but for every embryo, the same changes will be happening at the same point of development. If, during some time in that development, something comes about to cause a hiccup in development, this can have many different and apparently unrelated changes to the body (such as maybe some problem with one's liver may happen at the same time as a particular crease on the hand is developing, and so looking at the creases on the hand may tell you something about embryonic development that might tell you something about the liver).
There appears to be an association between finger length and sexual orientation...http://news.bbc.co.uk/1/hi/sci/tech/695142.stm