Some efforts have been made to prove negative mass behavior through some experiments performed in mechanics, and other disciplines as well as some theories in electrostatics, but I haven't found research about similar effects at the atomic level, where the most elementary mass given by the atomic nucleus is to be found.

• Is the second Newton's law still valid with negative mass?


• What could happen if we make the atom behave in a negative mass regime?


• Is the negative refractive index related to negative mass?


• Are we able to control the magnitude of mass?


• Are we able to control the sign of mass?

The answers to these questions are given through this book series, with results that are coincident with experimental data, except for the negative mass regime. Experiments must be done to confirm or invalidate the theory developed in these books. Needless to say, if experiments validate this theory, then a significant change in mankind is going to happen. In that case, I strongly ask scientists to cooperate by making use of the derived technologies for good and refrain from doing it for evil.