Overfishing

That rivers have a life of their own is an ancient idea become current again. Shape-shifting, vital and recognisably capable of being sickened or damaged – as the state of our fragile chalk streams so starkly illustrates – there is good reason why fluvial myths have such historic potency and why the flow of water enjoys so many figurative associations. The late James C. Scott, an amateur hydrologist and professor of anthropology at Yale, who died in July last year, opens his nicely fluent study with an unequivocal assertion – ‘Rivers, on a long view, are alive.’ In Praise of Floods examines the several ways in which homo sapiens have

Sharks were never far from our minds as we grew up on the beach in Adelaide. Although attacks were rare, they were real. My grandfather was witness to the fatal mauling of a swimming instructor in the 1930s, and later a friend from university was killed while scuba diving off Port Noarlunga. Yet for the most part sharks were more an idea than a living presence. Other than an unsettlingly close encounter with a bronze whaler when I was 20, my interactions with the creatures as a young person were mostly confined to observing gentle Port Jackson sharks, wobbegongs and grey nurses while snorkelling and diving. This tendency to see