Historical clue formulations

• Most abundant element in Earth's crust — 2022-04-12
• Astronaut's tankful — 2016-12-19
• Element #8 — 2014-10-22
• Network co-founded by Oprah Winfrey — 2014-05-20
• Scuba tank content — 2013-12-02
• Space shuttle supply — 2007-03-18
• Something in the air — 2006-03-16
• About 21% of the atmosphere — 2005-12-04
• Astronaut's supply — 1994-09-03