Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The theme of the apocalypse or end of the world is one of the topics that has captivated the minds of mankind and accompanied it for centuries. Ideas about the end times are often associated with various religious teachings, that describe both individual eschatology (life after death) and that of the world or universe, which portrays the way people thought about the end of the world. The attitude towards possible doomsday scenarios has changed with the advancement of science and many ancient religious or mystical ones have been replaced by new scientific and pseudo-scientific theories. Learn more with this book about the proposed modern ideas about the end of the world, both scientific and otherwise.