 Are you a scientist working with cell lines? Then, you should use Cellosaurus, the cell line encyclopedia. Cellosaurus has a freely accessible database, containing manually curated information on more than 150,000 cell lines, ranging from human to insects. In one single resource you can have access to all you need to know on your cell lines with reference to relevant publications and cross-references to more than 100 external resources. In Cellosaurus, you can find for example, the tissue or organ of origin of your cells, the age of the donor, the synonyms used in the literature and many more information that can be relevant in your work. Are you sure that your cell line is not cross-contaminated? In Cellosaurus, you can find direct information on the contamination status of your cell line, when available you can also check the STR profile of a specific cell line for comparison. Do you want to acquire a specific cell line? Cellosaurus gives you indications on where you can buy or find your cell line of interest. You need to reference cell lines in a publication? Cellosaurus is part of the resource identification initiative and provide a persistent and unique identifier for referencing in literature. You want to know more on Cellosaurus after watching this video? You can freely access Cellosaurus from Xbasi, the Swiss bioinformatics resource portal, or directly at this address. What are you waiting for? Go and explore Cellosaurus.