While their brains were having an advantage from being able to copy -- lighting fires, keeping fires going, new techniques of hunting, these kinds of things -- inevitably they were also copying putting feathers in their hair, or wearing strange clothes, or painting their faces, or whatever.
彼らの脳はコピーする長所をもっており-- 火を起こす事　燃やし続ける事　新しい狩猟法 といったものから 必然的に 羽を頭に飾ったり 奇妙な服を着たり 顔を塗りたくったり 何でもコピーしました