The weak Nuclear Force is the ONLY force with this same ‘handedness’.

Many molecules in nature occur in mirror images of themselves. The molecules look exactly the same except for this ‘handedness’ which is similar to your right hand looking like your left hand in a mirror image. These molecules all occur in exactly the same ratios. However these molecules in life only occur in one ‘handedness’. Living cells almost always choose right-handed sugars over left and left-handed amino acids over right. No one knows why this is the case. Non living stuff does not show any preference of left or right.

(The Great Courses – Origins of Life)

 

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