Historical clue formulations

• Round fig. — 2018-11-11
• Globe: Abbr. — 2018-05-07
• Three-dimensional fig. — 2017-05-03
• Globe shape: Abbr. — 2016-05-31
• Globe: Abbr. — 2009-11-10
• Geom. solid — 2007-03-25
• Geom. figure — 2007-02-09
• Geom. solid — 2006-09-28
• Geom. solid — 2004-12-31
• Geom. solid — 2001-06-24
• Geom. solid — 2000-07-05