Given the task definition and input, reply with output. 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.

Category: THE 19th CENTURY 
Clue: Thomas Huxley & Samuel Wilberforce were among the Oxford Museum speakers debating this theory June 30, 1860

evolution