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Sugar Molecule Found in Space Hints at Life’s Origins

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Scientists have detected erythrulose, a four-carbon sugar molecule, in interstellar space, marking the first discovery of a "true sugar" outside our Solar System. This molecule, more complex than previously detected space sugars, was identified using radio telescope observations of molecular clouds. The finding adds to growing evidence that the chemical building blocks necessary for life may be commonly formed in space before reaching planetary surfaces.


This discovery supports theories that essential biological molecules could have been delivered to early Earth via meteorites and comets, potentially contributing to the origin of life. Understanding how complex organic molecules form in space helps scientists identify which environments beyond Earth might harbor the chemistry necessary for life.


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Nature, Published online: 13 July 2026; doi:10.1038/d41586-026-02173-5

Erythrulose, which has four carbon atoms, is the most complex sugar spotted beyond our Solar System.

Source: First ‘true sugar’ molecule found in space — offering hints to life’s origins