Congrats to Allie Nagelski, as we celebrate the acceptance of her paper describing an interesting series of diiron complexes with carbon bridges that give us insight into the role of carbon in the catalytic cofactor of nitrogenase. This paper had a winning combination of synthesis, N2 reduction to ammonia, electronic structure, and spectroscopy, and we benefitted from the contributions of our own Majed Fataftah on magnetism, Kyle Lancaster’s group on X-ray absorption spectroscopy, and Brandon Mercado on crystallography. This paper was chosen for a special 10th anniversary issue of Chemical Science.