Wormholes: How these space-time shortcuts function as time machines
Consider two settlements on opposing sides of a mountain. People from these communities would have to trek around the mountain to see each other. They could, however, dig a tunnel right through the mountain to establish a shortcut if they wanted to get there faster. That is the concept of a wormhole.
A wormhole is a tunnel connecting two distant points in our universe that reduces the time it takes to go from one to the other. Instead of traveling for millions of years from one galaxy to another, under the appropriate conditions, a wormhole might hypothetically reduce travel time to hours or minutes.
Wormholes, because they are shortcuts across space-time, have the potential to operate as time machines. You could emerge from one end of a wormhole at a different moment than when you ent...