Many years ago I wrote a dissertation on convergent evolution, looking at the similarities between humans and aquatic mammals such as whales, seals, and dolphins, who share intelligence, lack of fur, subcutaneous body fat, and longitudinal shape. My intercalated BSc in anthropology involved analysing the arguments around an aquatic phase in human evolution, suggesting that early hominids may have arisen from a prehistoric ape adapted for seashore dwelling, rather than on the savannah. Should we maybe acknowledge the health implications of our possible watery past? Swimming and other aquatic activities have huge benefits for health and wellbeing. People of all ages and communities can benefit from water’s hydrostatic pressure, as well as improved social connectedness and exercise. For people with back or lower limb problems or obesity the low impact of swimming can make it an ideal mode of exercise, and charities such as Versus …