A particularly interesting part that I did not expect from the title:

> Before the rats encountered the detour, the research team observed that their brains were already firing in patterns that seemed to "imagine" alternate unfamiliar mental routes while they slept. When the researchers compared these sleep patterns to the neural activity during the actual detour, some of them matched.

> “What was surprising was that the rats' brains were already prepared for this novel detour before they ever encountered it,”