In this age of the discovery of atomic energy, the construction of nuclear power plants, the creation of nuclear weapons, in the age of the conquest of space, the widespread use of radioactive isotopes in industry, medicine and agriculture, more and more people are showing interest in high-energy radiation, visibly invading our lives. The book "When Worlds Touch" tells what this new form of energy brings to humanity, about possible ways to use it to improve the life and prosperity of peoples, as well as about the threat to life on our planet in the event of an atomic war.