I like metal clusters. Sometimes their synthesis look like a little bit of magic and luck, but the structures are always beautiful. In this paper, they synthesized 5 different iron clusters and fully characterized them. Luckily, they were able to achieve N2 reduction with some of these clusters too! To me, metal clusters are as close as you get to heterogeneous catalysis. As expected the yields of metal clusters are low and I hope they can find a way to synthesize these clusters in better yields. Nice paper!