Figures
2.1Topographic landscape illustrating how the more complex behavioural and cognitive repertoire in endothermic vertebrates, especially mammals, may have resulted from a reorganization of the ontogeny of some response systems
2.2A cladogram for rodents, spanning the three major divisions of the order
2.3A sequence of play fighting for a pair of juvenile deer mice
2.4A cladogram for murid rodents, on which is mapped the degree of complexity of play fighting
9.1Percentages of mothers and fathers who played with children in Caribbean and Latin American countries
9.2Percentages of mothers and fathers who played with children in African countries
16.3In the street near the city hall. Children’s Games, by Adriaen Pietersz van de Venne, 1625
16.4Cornelius Ketel, Double Portrait of a Brother and Sister, circa 1600
16.5Isaac van Swanenburg, Portrait of Catharina van Warmondt, 1596
16.6Jakob Seisenegger, Portrait of a Mother with Her Eight Children, 1565
