Weeks later Huxley's Evidence as to Man's Place in Nature showed that anatomically, humans are apes, then The Naturalist on the River Amazons by Henry Walter Bates provided empirical evidence of natural selection.
Några veckor senare visade Huxleys Evidence as to Man's Place in Nature att människor anatomiskt sett är apor, och sedan gav The Naturalist on the River Amazons av Henry Walter Bates empirisk bevisning för det naturliga urvalet.