Currently the following unexplained phenomena offer challenges for the physicist:

• Missing Mass of the Universe.
• Missing Mass and Shape of Galaxies.
• Proton Decay.
• Nuclear Force.  Gluons.
• The Force Responsible for the Expanstion of the Universe.
• The Machinery of Gravitation.

The proposed space-time-mass unified theory explains all of the above phenomena and opens the door for new thinking.