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Life’s First Peptides May Have Grown on RNA Strands
RNA and peptides coevolving in the primordial world might have jointly served as a precursor to the modern ribosome.
Life With Longer Genetic Codes Seems Possible — but Less Likely
Life could use a more expansive genetic code in theory, but new work shows that improving on three-letter codons would be a challenge.
Bacteria Sacrifice DNA Repair for Better RNA
Preserving its DNA ought to be a cell’s top priority. But bacteria slow their DNA repair to a crawl in favor of proofreading gene transcripts.