Historical clue formulations

• Igneous rock that makes up most of Venus's surface — 2026-04-16
• ___ metabolism — 2024-12-01
• Forming the bottom level — 2024-08-18
• Relating to the bottom layer — 2024-01-29
• Underlying — 2022-01-22
• ___ metabolism (energy expended at rest) — 2020-10-19
• Pertaining to the lowest possible level — 2020-03-22
• Underlying, as metabolism — 2019-01-26
• ___ metabolism — 2016-12-23
• Underlying — 2014-11-21
• Fundamental — 2014-11-09
• ___ metabolism — 2012-08-28
• Kind of metabolism — 2011-06-12
• ___ metabolism — 2010-04-29
• ___ metabolism — 2008-04-10
• Primary — 2005-12-31
• ___ metabolism — 2000-07-12
• ___ metabolism — 1999-06-06
• Kind of metabolism — 1998-05-27
• Underlying — 1997-07-06
• At the bottom — 1996-10-06
• ___metabolism — 1996-04-02
• Kind of metabolism — 1994-04-28
• For beginners — 1993-12-30