美国一项研究表明,人们常说的“初生牛犊不怕虎”其实是生理变化的后果,是大脑发育的必经阶段:在一些哺乳动物的青春期时,大脑发生变化,产生一种恐惧记忆抑制效应,使动物对恐惧经历的记忆力降低,进而表现为一种无所畏惧、敢于再次冒险的性格现象。 A study in the United States shows that what people often say is that “newborn calves are not afraid of tigers.” In fact, the consequence of physiological changes is the necessary stage of brain development: in some mammals, the brain changes during the puberty and produces a fear memory Inhibition effect, so that animals experience reduced memory of fear, and then showed a fearless, dare to risk another character.