Activity for Castonâ€
| Type | On... | Excerpt | Status | Date |
|---|---|---|---|---|
| Edit | Post #33709 | Initial revision | — | almost 5 years ago |
| Answer | — |
A: Using time travel without creating plot holes Time travel v. 1 : Back to the Future model. In this model people can go back in time and change the past; however, they must avoid the grandfather paradox or else a "bad thing" will happen like disappearing, which resolves it by force, but may also destroy the universe. This brings a second "dimens... (more) |
— | over 5 years ago |