Congratulations to C-DEBI scientists Elizabeth Trembath-Reichert and Victoria Orphan for the selection of their PNAS paper, Methyl-compound use and slow growth characterize microbial life in 2-km-deep subseafloor coal and shale beds (C-DEBI Contribution 389), for the 2017 Cozzarelli Prize. The annual award acknowledges papers that reflect scientific excellence and originality and is given annually to six papers published in PNAS.