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Red world is rich in sugars similar to those found in human cells

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Scientists in France and the US say Arrokoth is covered in sugars that make up RNA .

These include glucose and ribose sugars that are 'fundamental building blocks' of RNA .

At 4 billion miles away from the sun, it is 'too cold to support life as we know it' But the new findings suggest comets could have transported sugar molecules required for the origin of life to early Earth , about 4.5 billion years ago .