“I gotta ask, though,” I say. “The forward-progress rule. That is an absolute, isn’t it? I mean, it’s not like she could have been telling the truth, is it?”
Peter nods. “Time travel’s still a very much inexact science,” he says. “We might find some other way of traveling non-destructively, but I don’t think that there’s any way to safely travel into the future, except the hard way.”
“And what’s the hard way?” I ask.
“One second at a time,” Peter says, grinning. “One second at a time.”
As I settle into bed that night, I glance down into the covers, at the part of my pajamas that’s rising and falling gently with my breath. The Steamer is still there.