A fact from Siljan Ring appeared on Wikipedia's Main Page in the Did you know column on 17 July 2012 (check views). The text of the entry was as follows:
Did you know... that the Siljan Ring, a very large impact crater in central Sweden, has been the site for two attempts at commercial exploitation of natural gas and oil based on the theory of abiogenic petroleum?
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lead (introduction) vs main content sections[edit]
See WP:LEAD. The present lead is not a summary of the main content - it could be seen as a summary of content that is waiting to be written in more depth, that lacks a summary of the actual "content" section (Geology). Either the lead should be converted to a section and a new very brief smmary written, or the sections corresponding to the lead should be added (and a summary of the Geology section added to the lead). Boud (talk) 02:29, 14 July 2012 (UTC)[reply]