Historical clue formulations

• Dry streambed — 2024-05-28
• Often-parched gully — 2011-09-25
• Desert stream — 2009-11-01
• Dry riverbed — 2007-05-23
• Dry riverbed — 2005-04-17
• Gully that's usually dry — 2003-11-26
• Dry riverbed — 2003-07-28
• Dry wash — 2002-05-02
• African stream — 2000-04-19
• Desert stream — 1999-01-18
• Desert streambed — 1997-10-28
• Desert stream — 1996-07-22
• Desert streambed — 1996-03-26
• Arroyo — 1994-01-27