Although life tends to find a way, something first has to kickstart said lifeforms. Exactly how the first biological cells formed on Earth – and potentially on other worlds – remains an enduring mystery. Some theories point to the early Earth’s surface conditions as a viable laboratory for the self-assembly of the first viable membranes, RNA, DNA and associated molecular machinery, while seeding of the Earth’s primitive atmosphere by sugars and other precursors from asteroids and kin is required in other theories.
Recently [Izaskun Jiménez-Serra] et al. added to this debate with the reported detection of four-carbon sugars in the form of erythrulose in the interstellar medium. Using the 40 meter radio telescope at Yebes and the 30 meter radio telescope at Granada the signatures of this sugar was detected in a molecular cloud near the center of the Milky Way.
These sugars likely form on these interstellar dust grains from more basic two-carbon aldehydes and alcohols, with them providing conceivably a source of energy for early metabolic processes of developing lifeforms. This specific type of sugar is highly prevalent in Earth’s fruits, and thus its prevalence in interstellar space is at the very least an interesting coincidence, if not another puzzle piece in the overarching question of abiogenesis.
This articles is written by : Fady Askharoun Samy Askharoun
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