There's a particular kind of jigsaw puzzle that lives on a folding table for three weeks, half-done, walked past and picked at by everyone in the house — and that's exactly the point. This week we dig into the quiet, absorbing world of puzzles: their surprisingly dramatic history, why they hit different in winter, and what it says about us that we keep buying boxes of chaos we have to sort back into order. No productivity advice, no brain-training talk — just the genuine pleasure of snapping a piece into place.