Life has a new ingredient

Our prehistoric Earth, bombarded with asteroids and lightening, rife with bubbling geothermal pools, may not seem hospitable today. But somewhere in the chemical chaos of our early planet, life did form. How? For decades, scientists have created miniature replicas of infant Earth in the lab in order to hunt for life's essential ingredients. Now, one of those replicas points to a possible new ingredient in the world's first RNA.

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