638 days, 12 hours, 21 minutes, 35 seconds

That's the Particle museum she could have sworn Mary said, pointing to a round building visible from a park at the top of Marin Dr., overlooking the Bay Bridge and the Golden Gate. This is where the Manhattan Project started, where they split the first particles. It's part of UC Berkeley's astrophysics department now. And maybe not a museum, or at least not open to the public. That was nine days ago now, hard to remember the description exactly. Her head splitting.