Historical clue formulations

• Polar explorer Richard — 2026-03-11
• Explorer Richard who made the first flight over the South Pole — 2021-08-01
• Admiral who explored the Antarctic — 2016-08-30
• Disputed North Pole visitor — 2016-07-10
• Robert ___, longest-serving senator in U.S. history (51 years) — 2016-07-05
• "With ___ at the South Pole," first documentary to win an Oscar (for cinematography) — 2015-09-05
• Late West Virginia senator Robert — 2010-11-01
• Longest-serving senator in U.S. history — 2009-03-11
• Longtime West Virginia senator — 2008-05-10
• Polar explorer Richard — 2007-08-28
• Polar explorer — 2007-07-18
• Noted polar explorer — 2006-10-29
• Longtime West Virginia senator — 2006-03-27
• Polar-izing figure? — 2004-10-21
• Polar explorer — 2003-07-06
• Founder of Little America — 2001-09-16
• Polar explorer Richard — 1996-03-25
• Former Senate chief — 1995-12-02