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Scientists have long known that most compounds in living things exist in mirror-image forms. The two forms are like hands; one is a mirror reflection of the other. They are different, cannot be superimposed, yet identical in their parts.
A new study bolsters the idea that on the young Earth volcanic lightning may have provided some materials that made it possible for life to emerge.
Assume for a moment that there was some way to produce simple organic molecules on the early Earth.
By Dr. Richard Quinn; Carl Sagan Center for the Study of Life in the Universe, SETI Institute, and Gail Jacobs
The answer to the origin of life remains unknown, but here are scientists best bets