Historical clue formulations

• Landform commonly seen in a crescent shape on Mars — 2026-07-17
• Sci-fi novel with giant sandworms — 2025-05-21
• 2021 sci-fi epic nominated for Best Picture — 2024-08-14
• Sea turtle nesting site — 2024-08-11
• Novel with the desert planet Arrakis — 2024-02-07
• Sci-fi novel made into films in 1984 and 2021 — 2022-10-09
• Hit 2021 film based on a Frank Herbert novel — 2022-08-15
• First winner of the Nebula Award for best science fiction novel (1965) — 2021-10-24
• Hill on a beach — 2020-10-12
• First winner of the Nebula Award for Best Novel, 1965 — 2020-09-04
• Hill on a beach — 2020-07-20
• Beach hill — 2019-10-14
• Buggy area — 2019-08-16
• Buggy locale — 2019-03-23
• Sand ridge — 2018-09-10
• Seashore feature — 2017-10-08
• Beach hill — 2017-05-30
• Sand hill — 2016-07-25
• Impermanent hill — 2015-06-21
• Hill with a "slip face" — 2012-10-19
• Sci-fi novel made into a 1984 cult film — 2010-08-18
• Sight near a lagoon — 2010-03-06
• Buggy place? — 2009-01-21
• Hill you might drive a buggy over — 2008-08-25
• Rise by the shore — 2008-08-13
• Classic 1965 novel set on the planet Arrakis — 2008-06-08
• Rise by the shore — 2007-09-22
• Natural flood protection — 2007-05-10
• Coastal high spot — 2006-03-30
• Sand hill — 2005-01-17
• Herbert sci-fi classic — 2003-12-09
• See 9-Across — 2002-11-10
• Sandy slope — 2002-07-22
• Buggy terrain — 2002-04-07
• Wind-swept hill — 2002-01-13
• View from an oasis — 2000-07-09
• Seaside feature — 2000-06-08
• Desert sight — 1999-08-15
• Buggy terrain — 1999-06-13
• Frank Herbert novel — 1998-04-02
• High point at the shore — 1995-12-13
• Frank Herbert sci-fi novel — 1995-12-12
• Frank Herbert book series — 1995-11-24
• Sand formation — 1995-07-31
• Frank Herbert saga — 1995-06-08
• Cape Cod sight — 1995-02-01