Historical clue formulations

• Thickens, as cream — 2026-02-16
• Features of spoiled milk — 2023-12-14
• Sticks together — 2020-12-17
• Coagulates — 2019-02-26
• Stops streaming — 2018-04-06
• Stops flowing — 2007-09-09
• Worries for a cardiologist — 2007-05-31
• Doesn't run — 2007-02-25
• Artery problems — 2005-08-09
• Artery problems — 2000-11-28
• Coagulates — 1998-12-20