Historical clue formulations

• Aid in studying a culture — 2016-10-22
• Lab sight — 2013-01-03
• Round-bottomed container — 2012-02-24
• Long piece of glassware — 2010-10-17
• Science lab glassware — 2008-06-23
• Synthetic — 2003-08-08
• Place for a lab experiment — 2001-08-15
• Synthetic — 2000-07-29