He gives a nod of his head, because more information in this case can't hurt. More information in general can't hurt, even if Cougar can't shake the feeling that he's doing recon without an actual purpose.

"No," he says, dragging a finger over the table and eyeing it. "Two possibilities," he says. "Not many years and there were people." Because dust comes from dead skin cells and that means if there are people, then this type of dust layer doesn't mean much. "No people? Could be decades," he agrees.