1. “Sociable weavers work together to construct large nests in southern Africa, often in acacia trees. The nests can weigh as much as 1 ton and house up to 200 birds in individual chambers. Their cooperative behaviors also include chick rearing and defense against snakes and falcons.” Link here.
2. Why so much regional inequality in Britain (The Economist).
4. Shruti on Indian Matchmaking (Bloomberg).