MIT used to hold a party once a year (and might still do this) for Time Travelers. Why?

 Because the statistical probability that people from MIT could easily figure out is that Time travel exists and is presently alive and here on earth. Why?

Reason: 

"Because if Time travel can be invented in any Galaxy in the Universe then the likelihood that it is here right now (FROM THE PAST PRESENT OR FUTURE) is extremely high."

If you understand probability logic then you also get this.

In other words if Time Travel is possible to invent it is already here.

This is a scientific probability that is likely 90% to 100% true.

Why?

Because it doesn't matter where or when it was or will be invented in whatever galaxy it was invented in the likelihood is it is also here right now.

However, because this is far more dangerous than any nuclear weapon ever invented or will be invented this is all kept secret from the masses here on earth. WHY?

Because imagine this:

Hiroshima and Nagasaki were nuked by the U.S. during world war II and thousands and thousands died horribly during this.

Now imagine the earth blew up from nuclear blasts.

(This has happened many times since 1945 by the way)

But, time was changed on the time line we are now on so it never happened by retroactively killing those responsible before they were born (because with time travel you can do this).

Now you begin to see just how dangerous Time travel really is.

For example, someone with Time travel could theoretically go back in time and prevent human beings from existing here on earth at all.

Who prevents this: 

I call them the Galactic Time Guard that protects the Galactic Government's timelines throughout the Galaxy.

This is my present understanding of all of this.