'Ancestral Eve' crystal may explain origin of life's left-handedness
Wednesday, April 21, 2010 - 12:30
in Physics & Chemistry
Scientists are reporting discovery of what may be the "ancestral Eve" crystal that billions of years ago gave life on Earth its curious and exclusive preference for so-called left-handed amino acids. Those building blocks of proteins come in two forms -- left- and right-handed -- that mirror each other like a pair of hands.