Historical clue formulations

• Certain canine — 2026-06-19
• A narwhal's "horn," technically speaking — 2026-03-06
• Walrus's long tooth — 2026-01-05
• Means of defense for an elephant — 2025-08-08
• Walrus feature — 2024-02-27
• Boar's gorer — 2023-03-27
• Sizable incisor — 2022-07-15
• Prominent feature of a babirusa ("deer-pig") — 2020-11-13
• Boar's head feature — 2015-11-19
• Source of ivory — 2015-10-07
• *Narwhal feature — 2008-05-15
• Warthog feature — 2007-08-02
• Ivory source — 2006-12-05
• Mammoth growth — 2005-12-09
• Ivory source — 2004-05-20
• Narwhal feature — 2003-12-18
• Big tooth — 2003-12-04
• Walrus feature — 1994-12-15