This is the scenario the author Stephen Baxter used in the book Timelike Infinity. Wormhole technology on a ship sent in a relativistic journey circling the so

This is the scenario the author Stephen Baxter used in the book Timelike Infinity. Wormhole technology on a ship sent in a relativistic journey circling the solar system, used to bootstrap humanity and influence it in the past. There is a catch, this sort of time travel like many others only allows one to go back as far as the creation of the wormhole. Sort of like in Primer, it isn't a general form of time travel. You can take the wormhole forward, or from the other end backwards, but not prior to the time it was created.