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<p>Pentoses are essential carbohydrates in the metabolism of modern lifeforms, but their availability on early Earth is unclear since these molecules are unstable. Now, researchers from Japan, the United States and Australia reveal a chemical pathway compatible with early Earth conditions, by which C6 aldonates could have acted as a source of pentoses without the need for enzymes. Their findings provide clues about primitive biochemistry and bring us closer to understanding life's origin.</p>
A team led by scientists has exploited the limitations of chemical combinations to write a cookbook with hundreds of recipes that have the potential to give rise to life. Life on a faraway planet if it’s out there might not look anything like life on Earth. But there are only so many chemical