It is so as to avoid having corners.
Corners are ugly things, sticking out and inviting breakage.
PvR

R.bioson schreef in berichtnieuws
...
I have seen many plants and other livingthings having their coiled
body.
many trees can have a right hand strand or a left hand strand form,
just as they are forced to be that, but what caused them like that?
I also find that in our universe there are so mang coiled forms, the
typhoon, the clouds, the rocks, the stars groups and so on.
Is it to say that the coiled form is mor stable than other forms?
even I have been told that there are many right hand coiled forms
than
the left handed forms.
but why?