"I've never seen any other planets," Peggy says with an apology heavy in her words. She feels like she's missing information to be useful, but unfortunately she can only offer what she knows and she knows that this looks like Earth, but she also hasn't travelled all over. "The oxygen levels are clearly suited to life," she says.

"So Earth or something else like it."

What if this were some sort of alien planet? Maybe it would explain the somewhat abandoned state? The time period, even, to a degree? Or maybe she's just reaching.