19 November 2014
As hands come in left and right versions that are mirror images of each other, so do the amino acids and sugars within us. But unlike hands, only the left-oriented amino acids and the right-oriented sugars ever make into life as we know it.
http://feeds.sciencedaily.com/~r/sciencedaily/~3/Os-02K-E3jI/141119174822.htm
