Space and time have been first integrated into one mathematical entity of space-time by Hermann Minkowski. In 1908 Minkowski , Einstein’s former professor of mathematics, showed that the four dimensional space-time concept could be mathematically manipulated as space’s three dimensions reference system is; that can be done mathematically provided one uses “imaginary” numbers as defined in mathematics (use of the square root of –1). First Einstein thought this was a futile exercise of the mind, but he changed his mind and his General Theory of relativity ends up relying on the concept.

There exist another solution to integrate space and time though. A solution adopted in the book “The harmony of reality , in no Time...”, Chapter 7 (see link below). And that is a “physical” rather than a mathematical or “mental” solution. In the book, space and time are united in the physical phenomenon of “motion”. Every one knows what is motion.
You can put yourself into motion simply walking.

Whereas motion is mundane, there is a major problem with that choice as far as physics is concerned!

Motion doesn’t exist as a physical entity in physics. In physics motion is described as “positions in space” in function of “time”. Both position and time are “extern” to “physical” motion. In physics distance, time durations and mass define speed, momentum, acceleration and force. That means that speed momentum acceleration and force are all mathematical concepts derived out of the three fundamental quantities of mass, time and distance. A club to which obviously motion does not belong.
As surprising as that may be, there is no mention of the “essence” of motion in physics! Even in particle physics only particle matter and particle force exists. The physicality of the phenomenon of motion is ignored in particle physics, quantum mechanics and string theory!

So a big difference between “The Harmony of Reality, in no Time..” book and physics is that the book relies on the physical phenomenon (that everybody can experiment with) of “motion” instead of our concepts (that we cannot directly or physically experiment with) of time and space.

Once motion is accepted as a physical entity, a realization easily done by any human being, an entirely new thinking about our “concepts” of time and space has to be set in place (within our minds). Time and space are now integrated as one unit that is motion. Time and space must be imagined in a reversed manner.
Instead of “imagining” that matter (and light rays) travel “through” space in time (or in space-time), motion becomes the prime or essential entity within which small quantities of time and space are to be found.
In order to integrate our concepts of space and time into the reality of motion, we have to convince ourselves that “first” motion is a fundamental entity of Nature and “then” that the components of motion are bits of space and time.

Note that Einstein was the first to have the idea to integrate space and time. As such there is no great merit to go one step further and integrate both space and time into the single physical entity of motion.

In the book “The harmony of reality , in no Time..." Chapter 2 (see link below) motion is made of bits of space and bits of time (or bits of space-time).
The theory presented, which is called Gravimotion, even though called a theory, is not at the edge of physics at all! It is presented as a theory because there are no other words.
Gravimotion is simple in that it deals with a single concept!
Gravimotion is exclusively based on the simple reality of motion.
Most importantly gravimotion’s simplicity is coherent and can be comprehended by anyone interested.

Get hold of the book "The Harmony of Reality, in no Time...", click on the link below.