Matter (is that a pun)
If its required to travel faster than light to time travel, and no humans have achieved it yet...
What if it's DATA thats being sending info back and forth, Can DATA travel FTL?
BTW Its only 3pm where i am, but its always 420 ;)
Project Looking Glass is very intriguing, especially with the Ingersoll Lockwood books from the 1890's about America's last President Don Trump from the great tower in NY, his adviser Pence, and his son Baron... Mysteries aside, there is at the minimum Quantum computing... and other technologies for game-planning that are obviously in use.