Historical clue formulations

• Like elephant seals — 2016-01-21
• Seal classification — 2013-07-19
• Like many seals — 2010-08-13
• Like harp seals — 2007-09-19
• Like harp seals — 2007-02-07
• Like some seals — 2003-07-13
• Like some seals — 2003-04-06
• Like some seals — 1997-08-07
• Like some seals — 1995-11-11