I was reading a Discover magazine and there was an article "A Two-Timing Universe". Theoretic physicist Itzhak Bars proposed that adding a second dimension to time and a fourth dimension to space (other than time, of course) would help bring to light answers to questions regarding M-theory. He believes it would create a more complete model.
If time is simply a measurement of change, then there can be only one.

Do you believe a second dimension of time can exist?

If there was a second dimension of time, what do you think it would be like? What exists there?

In string theory, there are six more dimensions. The strings are there. Do the strings have their extra time dimension?

Hello P562
A timeline is a recognized sequencing of non-repeatable positions or events. Action in a specific state of occurrence at a specific point in space, represents a snapshot of relative position to all other matter or energy in the universe. This action precipitates and precedes events that occur as a consequence, but occur at a different point in space, as everything in the universe is in relative motion. The consequential reaction, in a specific state of occurrence which can be labelled as effect, can be related to relative position of all other matter and energy in the universe at that point. That no event may ever repeat itself in relative position to the universe is apparent.

Time is a sentient measurement of relative motion or periodicity of events.

Weirdness occurs whenever we attempt to impose our imagination upon reality. In ones imagination, any number of dimensions may become possible.

Jack

Well stated.

I think many scientists today represent kids playing make believe.

I believe there are 4 dimensions.

Height, Length, Width and Time.

Now experiments, particularly ones that involve the least known and hardest to work with subject of quantum physics, that result in unexplainable outcomes are resolved by changing what is known to be true rather than searching for the unknown explanation that would make it work with what is known to be true. All simply because it is easier to change the shape of the piece in the puzzle to allow anything else to fit then it is to find the piece that is meant to fit in the first place.