A recent NASA-funded study has observed findings about the molecular processes that might have shaped the origins of life on Earth. Research published in Nature Communications suggests that ribonucleic acid (RNA), a molecule believed to have predated DNA, exhibits no inherent bias in producing the left- or right-handed versions of amino acids. This challenges long-standing assumptions about why life predominantly uses left-handed amino acids in its proteins, a phenomenon known as homochirality. The Enigma of Molecular Handedness Amino acids, the essential building blocks of proteins, exist in two mirror-image forms: left-handed and right-handed. Life on Earth exclusively relies on the left-handed variety, though there is no apparent reason right-handed amino acids would not function similarly. This phenomenon has baffled scientists, as it appears to reflect a fundamental aspect of biology. The current study, led by Irene Chen, Professor at the UCLA Samueli School of Engineering, tested ribozymes—RNA molecules capable of acting like enzymes under early-Earth conditions. The results indicated that ribozymes could favour either handedness, undermining the notion that RNA inherently favoured the left-handed type. …