TASK DEFINITION: You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.
PROBLEM: Category: MATHLETES 
Clue: John Nash has a beautiful mind that contributed to this "theory" of strategic decision making

SOLUTION: game theory

PROBLEM: Category: DAVID BOWIE 
Clue: The film "2001" inspired this song heard here:

SOLUTION: "space oddity"

PROBLEM: Category: DOWN UNDER 
Clue: In 1912 Aussie explorer Douglas Mawson led an expedition south to explore the east coast of this continent

SOLUTION:
antarctica