Simplify the following text for a Grade 13 native English-speaking person.
Original: At the historic debate on evolution held at the Oxford University Museum on 30 June 1860 , Bishop Samuel Wilberforce , Benjamin Brodie and Robert FitzRoy spoke against Darwin 's theory , and Hooker and Thomas Henry Huxley defended it .
Simplified: At the historic debate on evolution held at the Oxford on 30 June 1860 , Bishop Samuel Wilberforce , Benjamin Brodie and Robert FitzRoy spoke against Darwin 's theory , and Hooker and Thomas Henry Huxley defended it .