User blog comment:Mike Gilbert/Do you think the Reapers should keep their powers after Synthesis?/@comment-8419211-20130518030659/@comment-8419211-20130519063043

Well, I'm not sure, cuz I can see only one similarity between mass relay and wormhole - tunnel with two ends each in separate points.

Even if relays based on wormholes, it means that Reapers actually knows about wormholes and how it works. We heard in ME about black holes but nothing about wormholes. So many questions and no answers.