Historical clue formulations

• Block housing — 2026-03-21
• Cool places to live? — 2025-08-24
• Arctic abodes — 2025-03-24
• Well-insulated homes — 2024-09-27
• Rounded quarters — 2021-09-12
• Ice pads? — 2020-06-14
• Some brick houses — 2019-09-29
• Houses that may include tunnels — 2019-01-06
• Inuit homes — 2018-04-16
• Structures with excellent insulation — 2016-10-08
• Digs in the Arctic — 2015-07-12
• Inuit homes — 2009-07-21
• Homes that may have tunnel entrances — 2007-12-30
• Homes with domes — 2005-07-24
• Block houses — 2004-04-03
• Block houses? — 2001-06-23
• Inuit homes — 2000-11-26
• Block houses — 1999-07-21
• Block houses? — 1997-12-05
• Homes with domes — 1997-02-16
• Block houses? — 1996-02-04
• Nome's domes — 1994-12-25
• Northern hemispheres? — 1994-01-02