Within the overriding constancy of the speed of light, all phenomena in our camouflage reality– motion, velocity, mass, matter, time, space, gravitation, and so forth–are seen as relative to each other. Space and time, for instance, are not separate or uniform entities, but closely related intuitive “constructs” of consciousness; mass is a form of energy; motion is not absolute, but relative to the motion of something else; two observers, each moving at a different velocity relative to a common sequence of events, will perceive those events in different courses of time

In its own way the dolphin (and the whale) grasp such phenomena– and without the aid of the very sophisticated written calculations and the physical instruments we humans use.