Every fifth published metagenome is not available to science. - Eckert, Ester M.; Di Cesare, Andrea; Fontaneto, Diego; Berendonk, Thomas U.; Bürgmann, Helmut; Cytryn, Eddie; Fatta-Kassinos, Despo; Franzetti, Andrea; Larsson, D. G. Joakim; Manaia, Célia M.; Pruden, Amy; Singer, Andrew C.; et al. (PLoS Biology, 2020)