The book profiles five Hungarian-born scientists who emigrated to the United States and made seminal contributions to the fields of physics and chemistry during the 20th century. These scientists, often referred to as "The Martians" due to their seemingly otherworldly intellect and insights, played pivotal roles in the development of atomic energy, nuclear weaponry, and various technologies that have had profound impacts on both scientific thought and global politics. Through detailed biographical sketches and the exploration of their major scientific achievements, the book highlights their unique talents, their struggles as immigrants, and their lasting influence on American science and technology.