1. Parallel Universes 🌌

Some theorists propose that déjà vu might actually be a glimpse into parallel universes. According to this theory, when you experience déjà vu, you could be momentarily tapping into a reality where another version of you is living out a similar scenario. It's a fascinating idea, though one that lacks solid evidence. Still, it’s fun to think that your brain might be crossing dimensions without you even knowing!