Our first steps tour and our frequently asked questions will help you a lot after registration. They explain how to customize the interface (for example the language), how to upload files and our basic licensing policy (Wikimedia Commons only accepts free content).
You don't need technical skills in order to contribute here. Be bold when contributing and assume good faith when interacting with others. This is a wiki.
Wiki Science Competition 2021 has started
Dear uploader of European Science Photo Competition 2015 and Wiki Science Competition 2017 and Wiki Science Competition 2019, we would like to remind you that Wiki Science Competition 2021 has started in the whole world. It is now completed in Russia (active in May), but it's still open in almost all the other countries.
If you are an expert user, we remind you that images uploaded within the deadline can be included in any case in their national category even if not uploaded with the main interface.
Please keep in mind that there is a new category this year, that is "astronomy".
If you already took part in a country that has completed its upload phase, please consider improving the description in English of your files (click on the edit button), since such description is what the international jury will use to evaluate them. World finalists will be finalized after March 2020.
Sorry for bothering you and have a nice wiki.