宇宙万物是由什么组成的?这可是一个深奥的问题。古希腊人认为是水、土、火、气四种元素,古代中国则相信金、木、水、火、土五种元素。到了近代,人们才渐渐明白,宇宙万物是由各种化学元素组成的。如果我说,它们中有许多是无意间被大家发现的,你相信吗?炼金术士那个年代的化学家,在很大程度上就是炼金术士——认为可以把普通金属变成银子或金子的科学家。德国人约翰·贝歇尔走得更远,他很有把握地认为,只要有合适的材料,他可以把自己变成隐形人。另一位德国人亨内希·布兰德更加 What is the composition of the universe? This is a profound question. Ancient Greeks considered water, soil, fire and gas as four elements. Ancient China believed in five elements of gold, wood, water, fire and earth. In modern times, people gradually came to realize that everything in the universe is made up of various chemical elements. If I say that many of them were inadvertently discovered by everyone, do you believe it? The chemist of the age of the alchemist, for the most part, is an alchemist - a scientist who thinks that ordinary metal can be turned into silver or gold . The German, John Bethel, went further, knowing with certainty that he could turn himself into an invisible man with the right material. Another German, Hennessy Brand, is even more