"Longer, actually. There was a long period of genetic tinkering before they went to outright cloning," Sheppard said. "It's just that around ten thousand years ago they started to realized they'd fucked up the entire process to the point that they still haven't managed to reverse the damage, although that's partly because of some war-related infrastructure damage. I don't know the exact details, because they really hate talking about it. They could do the machine thing if they wanted to, but there's all sorts of weird philosophical objections about continuity of consciousness and whether you're really the same person if you're in a mechanical rather identical biological body. It's a bit silly if you ask me, since they're already storing backups for emergencies and bouncing from clone to clone as the old ones fall apart because of bad planning, but it's their lives."
"Besides," Vala said, "even metal bodies can be killed if you have the right technology, so why not stick with ones that can still enjoy all the pleasures of the flesh?"
"Not that they didn't fuck that up, too," Sheppard said. He looked to Viera and said with a small smile, "I take it you're some sort of expert on advanced alien technology brought here to help plunder the city's scientific riches?"