It was the size of a postage stamp and just as thin, and was a thin covering around their walnut-sized brain, but it was capable of a new type of thinking.
ちなみに 大脳新皮質を 有するのは哺乳類のみです-- それは切手サイズの大きさと薄さで 彼らのクルミ大の 脳を覆う ほんの薄い外皮だったのですが