I’m reviving this thread to make it a wiki thread. Regular, leader and moderators ranked users (such as @Omicron, @tjwhale and @hhyyrylainen [I’m mentioning you because I expect you have great knowledge in some fields, besides you have the ability to make wikiposts]) can post a subject or field of study (e.g. chemistry, physics, programming, math, politics, political regimes, biology, linguistics, game designing, etc.) and make it a wiki with the wiki tool (the wrench icon). Then, anyone can edit the wiki post provided they have a relevant and reliable source (Wikipedia can be used as a source, however its selected article must be reliable depending on what information is used in this thread).
WARNING! The wikiposts cannot be used as a source for a school work! It’s only for vulgarizing notions of some fields of study!