In one famous incident, which became known as the Great Hippocampus Question, Huxley showed that Owen was mistaken in claiming that the brains of gorillas lacked a structure present in human brains.
Dalam satu insiden terkenal, yang dikenal sebagai Pertanyaan Hippocampus Besar, Huxley menunjukkan bahwa Owen salah mengklaim bahwa otak gorila menyusutkan struktur saat ini dalam otak manusia.