Researchers found that risk takers have less of a particular type of dopamine receptor, thus they feel happier than normal people when seeking novelty.

• 研究者发现，冒险者的大脑中没有足够的多巴胺"接收器"来存多巴胺，因此，冒险爱好者每次追求刺激时都会尝到比一般人更大的快感。