Historical clue formulations

• Greek crosses — 2025-08-17
• Some sorority letters — 2024-12-04
• Some short-lived particles — 2023-04-15
• Greek T's — 2019-03-19
• T-shaped crosses — 2018-01-11
• T-shaped crosses — 2016-08-24
• Torque symbols — 2012-09-02
• Some crosses — 2012-04-22
• Certain crosses — 2011-09-24
• Sorority letters — 2011-02-02
• St. Anthony's crosses — 2008-11-28
• Unstable leptons — 2008-08-23
• Greek consonants — 2005-10-25
• Short-lived particles — 2004-04-03
• Particles of the lepton family — 2004-03-20
• Cross shapes — 2003-06-04
• Greek crosses — 2003-03-15
• They're cross-shaped — 2000-08-27
• Laertes' T's — 2000-04-02
• Crosses — 1994-08-12
• Sorority letters — 1994-06-05
• Elementary particles — 1994-05-29
• Greek letters — 1994-05-09