In the big world of little RNAs, there is much to be explored. For instance, how many miRNAs have been discovered in the genome of the mosquito, Aedes aegypti? How many gene targets exist for those miRNAs? If you find yourself pondering these, or similar, questions, you should take a trip to MicroCosm, a miRNA resource developed by the Enright Lab at the EMBL-EBI containing computationally predicted targets for miRNAs. The database of predicted targets is not just limited to mouse or human but rather, it contains information for 22 species ranging from worms, to insects, to chickens, to humans. In a nice summary page, visitors can find the list of included species, as well as the number of miRNAs, transcripts, and targets for each species that are included in the database. Users can download the target information for all species, in either GFF or TXT format.