Historical clue formulations

• Drifting platform for polar wildlife — 2022-12-19
• Drifting sheet — 2022-01-18
• Something fallen off a shelf? — 2014-11-15
• Polar bear's resting spot — 2013-05-22
• Penguin's locale — 2011-01-06
• Seal's resting place, perhaps — 2010-05-13
• Antarctic sight — 2003-09-13
• Ross Sea sight — 2002-01-03
• Arctic sheet — 1996-12-07