They're obsessed with them - it's weird. Usually when you see a mass haunting like this, the restless spirits will be focused on their own concerns and their own lives, not a single thing. Of course, this is a research station, so the labs might be a natural thing for them to focus on, but it's still strange...

[He's thinking aloud, probably saying too much while he runs it through, but he doesn't care right now; he's focused on the problem at hand.]