Historical clue formulations

• They may be yawning — 2023-04-09
• Big gaps — 2018-07-06
• Gulfs — 2016-07-16
• Gorges — 2009-08-03
• Deep divides — 2009-07-08
• Challenges for daredevil motorcyclists — 2008-01-09
• Gorges — 2003-11-01
• Big drops — 2002-12-19
• Gaps — 2000-05-06