Orichalcum

"Orichalcum? but that's a mythical metal only mentioned by Plato, it was supposedly similar to copper and it was present in..."

"Atlantis, we know because that's where we found the first piece." Nika cut him short.

"But that means..."

"That Atlantis was found, I thought you knew about the Mapple project." Nika interrupted him again but Uriel wasn't even mad. Instead, he was speechless and his mind struggled to keep up with the speed of his thoughts.

If Atlantis had been found already but its discovery wasn't made public, it could only mean that either it wasn't profitable to do so or they screwed up. He had heard Nika mention before that they attempted to break into an underground structure before by nuking it and he remembered her say it was classified information.