Our second paper on the chemical origins of life is published in Nature Ecology & Evolution. We show that metallic iron powder fixes carbon dioxide as acetate and pyruvate much like the Acetyl CoA pathway, an ancient biological pathway used by microbes to build themselves. It represents a rare “chemistry-up” experiment that connects with the current “biology-down” understanding of early life. Congrats to Sreejith, Kamila and Paul! Free read-only version here. Paywall version here. Also check out the accompanying Behind the Paper post here.