A long time ago, a dukeduke/djuːk/L1公爵（古代欧洲的一种贵族称号）a man from a very important family who rules a small area named Francesco died in one day. His wife died too. Some people thought his brother Ferdinando gave them poisonpoison/ˈpɔɪzən/L1毒药（能让人生病或死掉的东西）something that can make you very sick or kill you if you eat or drink it. But new sciencescience/ˈsaɪəns/L1科学（通过实验和观察来了解世界的方法）the study of how things work in the world, using experiments and facts found the real reason.
Scientists looked at bones from Francesco and his brother Giovanni. They found a sickness called malariamalaria/məˈleəriə/L1疟疾（一种由蚊子传播的疾病，会让人发高烧）a sickness that people get from mosquito bites, which gives them a high fever in the bones. Malaria comes from mosquito bites. It gives people a high fever. Francesco got very sick when he went hunting.
Now we know the truth. Francesco did not get poisonpoison/ˈpɔɪzən/L1毒药（能让人生病或死掉的东西）something that can make you very sick or kill you if you eat or drink it. He died from malaria. This story is important because it shows how sciencescience/ˈsaɪəns/L1科学（通过实验和观察来了解世界的方法）the study of how things work in the world, using experiments and facts can solve old mysteries.
