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Are you right-handed or left handed?

29 Jun 2016, 21:21 UTC
Are you right-handed or left handed?
(200 words excerpt, click title or image to see full post)

Not such an important question. It turns out that sugars and proteins, essential to life, are either left-handed or right-handed, and researchers are now finding ‘handed’ or ‘chiral’ molecules out in space.
All of life’s chemistry seems to be based on chiral molecules of a certain handedness, a concept known as homochirality. All the amino acids that make up life’s proteins are left-handed, the sugars that form the helical backbone of DNA are all right-handed, and so on.

But why has life tied itself to right-handed sugars or left-handed proteins — why not the other way around? The answer, it turns out, might lie in the stars.
http://www.skyandtelescope.com/…/first-chiral-molecule-dis…/
Image: National Radio Astronomy Observatory

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