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Many molecules essential to life exist in two forms that are mirror images of each other, like left and right hands. Yet living organisms almost exclusively use only one version that has puzzled chemists for more than a century.
The Nobel Committee recognized Henri Kagan and Kenso Soai for solving a century-old mystery about molecules with mirror images. Their work is crucial for pharmaceuticals and carries clues to the origins of life.
Depends on what you mean by “reason”
New research suggests animals could have evolved as early as 800 to 700 million years ago, roughly 200 million years earlier than some previous estimates.
