The following is a guest post by Bob Mesibov. There's still time (to 31 March ) to enter a dataset in the 2020 Darwin Core Million, and by way of encouragement I'll celebrate here the best and worst Darwin Core datasets I've seen. The two best are real stand-outs because both are collections of IPT resources rather than one-off wonders. The first is published by the Peabody Museum of Natural History at Yale University.