Laboratory studies of ape language ability began to reveal other human traits, as did genetics, and eventually three of the great apes were reclassified as hominids.
猿语言能力的实验室研究开始揭示它们的其他人类特征，遗传学方面也得出类似结果，并最终三种类人猿进行了重新归类为原始人类。