Ether Flux Theory (EFT) has been put forward to explain many physical phenomena of nature, employing a single assumption, the existence of ether. The theory explains gravity, inertial mass, diffraction, interference, quantum mechanics (double slit experiment), and radioactive decay. It has been developed based on logical deduction for the existence of ether (aka aether). Supportive evidence are provided, in places, by which one can verify the assumptions and axioms used in EFT. The EFT is a logical framework, a first step for any physical theory, rather than a system of equations as it is believed that a complete theory based on EFT may not be provided by a set of equations, rather a computer simulation model is thought necessary. There are also some experimentally verifiable predictions, arising from this theory, which when confirmed will provide proof for EFT. Using EFT gravity and quantum mechanics explained, with a single assumption, which has been a long standing problem in physics. It is hoped that based on EFT a more rigorous physico-mathematical theory will be developed by the physicists and mathematicians (uniting gravity and quantum mechanics) which has been a long standing problem in modern physics.