Historical clue formulations

• "Space ___" (1969 David Bowie single) — 2026-03-17
• Rare bird — 2026-03-07
• Curio shop treasure — 2026-02-07
• Marvel — 2020-03-20
• Singular thing — 2018-02-16
• Item fit for "Ripley's Believe It or Not!" — 2012-07-24
• Ripley's love — 2011-08-27
• Curious thing — 2004-05-17
• Rare find — 2003-07-16
• Marvel — 1994-01-09