‘Read monkeys for pre-existence’ wrote the twenty-nine-year-old Darwin in one of his notebooks, pondering Plato’s assertion that our ‘imaginary ideas’ derive from the pre-existence of the soul. Two years earlier, when HMS Beagle had returned from its circumnavigation of the world, Darwin was still a creationist, albeit one who had entertained doubts. Keen to capitalise on his wide-ranging collection, and to make a name for himself, he arranged for various experts to examine the specimens. Fairly quickly during the ensuing discussions, Darwin realised that his doubts concerning the stability of species were ready to burgeon into a new and disturbingly materialist worldview.

Antarctic exploration began with Captain James Cook’s circumnavigation of the continent (1772–75) and continued intermittently until the first two decades of the twentieth century. Douglas Mawson’s three expeditions coincided with what has been called the ‘heroic era of Antarctic exploration’, beginning with Robert Falcon Scott’s British National Antarctic Expedition (1901–4) and ending with Ernest Shackleton’s Imperial Trans-Antarctic Expedition (1914–17). Four out of the twenty expeditions undertaken in this period stand out: those of Roald Amundsen, Mawson, Shackleton and Scott. However, the present-day polar adventurer Ranulph Fiennes has argued that Mawson did not achieve the fame of the other three, even in Australia, because he survived his explorations and died in old age.

In Defence of Food is several books rolled into one. It is a primer on nutrition science, a contextual exposé on what we put in our mouths, an advertisement for the joys of eating and even something of a self-help diet and behavioural book. It is also part of Michael Pollan’s ongoing conversation with the reading (and eating) public, and is more satisfying when placed within his oeuvre, particularly The Omnivore’s Dilemma: A Natural History of Four Meals (2006).

Mostly, though, In Defence of Food is a polemic about ‘the problem of the Western diet, and how we might plot our escape from it’. Pollan even cites a shiny new eating disorder for us to worry about: an ‘orthorexic’ is a person ‘with an unhealthy obsession with healthy eating’. While Pollan writes about the United States, we only have to read the ingredient lists on our supermarket products, or reflect upon the controversy over the meat-heavy (or meat-rich, depending on your viewpoint) CSIRO diet books, to recognise the Australian relevance of the ‘Western diet’ debate.

The award of the 1915 Nobel Prize in Physics to William Henry Bragg, sometime Elder Professor of Mathematics and Experimental Physics at the University of Adelaide, and his Australian-born son William Lawrence Bragg is one of the icons of Australian science. Their ‘services in the analysis of crystal structure by means of X-rays’ is mentioned in the guide for new Australians, Becoming an Australian Citizen (2007), so we can put them up there with Don Bradman and Captain Cook.

To earn some money as a student in the late 1980s, I did a short stint at CSIRO Marine Laboratories in Perth, identifying deep-sea fish. I spent a couple of weeks up to my armpits in pale, preserved and squashed fish, which were extremely hard to identify, partly because of their misshapen form and lack of colour, but also because many of the species were entirely new to science. Some looked like old, flattened doughnuts and clearly lived on the seabed. Others were compressed sideways and had light-emitting organs on their sides, strange plate-like structures or razor-sharp serrations along their bellies, and were clearly more adapted to a mid-water mode of existence. But without exception, these fish were drab and dead as dead can be. I can only imagine what they must have been like when alive in their natural environment.

The old country is, by his own admission, George Seddon’s last book. Last books are generally the products of two factors: posthumous recognition of work-in-progress, or a generous sharing of one lifetime’s accumulated wisdom. Happily, this book falls into the latter category. The opening chapter does nothing to jolt this impression; with avuncular ease, Seddon introduces his characters and stories. We sit with Uncle George at the fireside – or more realistically, given the irony of the title, around the campfire. The stream of consciousness is conversational, discursive and often intensely personal. Seddon has a gift for storytelling. While still in the roman numerals of the preface, we have a telling example: ‘The past lies at the author’s feet,’ Seddon observes epigrammatically, his boots juxtaposed over 3.5-billion-year-old stromatolites at Marble Bar in Western Australia’s far north-west. We immediately under-stand that the author’s time frame is very wide indeed. We were half expecting a gardening book – or at least a book about plants, judging from its Dewey classification – but should not be surprised by this un-conventional opening gambit. ‘We live in old landscapes with limited water and soils of low fertility,’ Seddon explains, ‘yet with a rich flora that is adapted to these conditions, as we are not. There is much to learn from it, but we have been slow learners.’

In 1972, at the start of my career as a science journalist, I was asked to produce the Commonwealth Day documentary, a portrait of the spectacular Anglo Australian Telescope being built on Siding Spring Mountain. Together with the Australian National University, an independent board was driving the telescope project. I set off to Canberra to interview the infamous Olin Eggen, then director of Mount Stromlo.