Historical clue formulations

• Female? — 2020-12-10
• Marvel hero with multiple M.I.T. degrees — 2019-11-06
• Grueling kind of race — 2019-06-15
• Role in "The Avengers" — 2019-05-30
• Exceptional athlete — 2019-02-23
• Avenger in a red-and-gold suit — 2018-08-21
• Tony Stark's alter ego in comics and movies — 2017-09-05
• Athlete among athletes — 2017-06-03
• Robert Downey Jr. title role — 2010-07-25
• Certain triathlete — 2010-06-07
• Tough guy — 2002-03-10
• Lou Gehrig or Cal Ripken — 1998-04-12
• Triathlon competitor — 1994-10-26
• Triathlete — 1994-03-02