time was discovered to be much more malleable & flexible than previously thought
is slows in gravity relative the continuum of surrounding space
einsteins work in early 1900s in this was thought to be poppycock by fellow eggheads of his time, he was proven correct in predictions of how many degrees of arc sunlight is deflected in a lunar eclipse,,his math was off by a few decimal places,but correct in the concept.
time & place in the universe may be traversable in similar fashion in ftl space travel
we aint there untli engineers use some eggheads' math of this age to scope it out,build a device up to the job,one with a drive able to zero out that seems to be a physics stop sign no one can get through,zeroing out mass accrual in speed of light travel, and other as yet unknown components of such a drive mechanism.