This book is partially a continuation of my previous book, "New Ideas for a New Era". In this book some of the ideas that were introduced in the previous book are expanded. An example of this is an expanded version of the new relativistic theory based on Newton's second law for motion and how and why it is superior to Einstein's Special Theory of Relativity. Besides this, other ideas that were simply presented, without any proof in the previous book, a mathematical proof is given to show their correctness. An example of this is the mathematical proof for the equivalency of Dark Matter and Dark Energy with the consequence that if gravity exists then anti-gravity, mathematically, must also exist. The paper on a mathematical theory of the nervous system applies the new set theory introduced in the previous book. Aside from these, there are other papers that are completely new. Examples of these include the paper on the nature of Tachyon, the non-equivalence of inertial and gravitational mass of an object, with one of the consequences being that a photon can have zero inertial mass but non-zero gravitational mass. This will provide an explanation for the bending of light due to gravity without the need for the warping of the space-time continuum. I hope the reader will find these papers to be a quantum leap forward in our understanding of our Universe.