Was it blue? lol
i had one catch in my throat once.....had a stiff neck for a week
But back to the topic, we dont fully understand the mechanics of the universe yet, so i'm not ruling time travel out.
Mysterious bond between atoms found in white dwarf stars could change computing forever | Mail Online
The find rewrites the rules of the universe
I suspect we will have to revise the "rules" many times.
Personally i think the ability to travel to any co-ordinate, both in terms of distance, and duration will turn out to be relatively simple in the end.
I think linear time is an artifact that we are stuck in only because of our limited terrestrial circumstance, ie stuck in a gravity well.
Everything we do , experience and even experiments are relative to that circumstance.
We know time moves at variable speeds based on proximity to mass, i think the ability to travel anywhere and anywhen will be possible one day.
I suspect it involves stepping "outside" linear time to the dimension above, and then back down into it, at a co-ordinate of your choice.