Science

‘Is there life on Mars?,’ asked David Bowie, and would not stay for an answer. The astrobiologist Steven Benner has an answer – which is that Mars not only has had life but still does. The first part of that answer is broadly accepted; the second remains highly contentious. His book is a scattershot plea for increased attention to be paid to searching for evidence – or, as he sees it, more evidence. The stakes are high. As he says in his introduction, if life exists only on Earth, that’s a coincidence; if it exists on Earth and a close neighbour, that’s the start of a pattern. Mars has always excited the imagination. No one has ever speculated hubristically about the chances of anything coming from Mercury. C.S.

A decade ago, I planted 12 acres of trees in a field that had proved unsuitable for productive grazing. The trees themselves are doing well but the most remarkable change has been the increase in birds, invertebrates and flora. Each year brings new species, new levels of abundance. It has been very satisfying and strangely quick. We’re encouraged to think that the planet’s natural processes work if not always at a geological pace, at least not in the instant reward timeframe that characterises our own brief lives. In Nature’s Echo, the leading ecologist Thomas Crowther takes this capacity for nature’s rapid recovery as one reason why we should temper pessimism about environmental catastrophe.

George Forster (1754-94), the German-Polish polymath, was in every sense a late Enlightenment prodigy. He was just ten years old when he accompanied his father, Johann Reinhold, on a scientific expedition to Russia and still in his teens when he sailed with him on Captain Cook’s epic three-year voyage to Antarctica and the Pacific islands. The ensuing book, A Voyage Round the World (1777), largely written by George, became a classic. It established him as one of the most significant naturalists and travel writers of the age, leading to him being elected a Fellow of the Royal Society aged just 22. He was also a very young polyglot, having learnt German, French, English and Russian by the age of 12. (He later added Dutch, Italian, Spanish, Portuguese and Swedish, as well as Latin.

This book begins strangely. Kathryn Paige Harden and her man Travis go off into the Texas desert to take some LSD in the hope that it will provide a ‘hard serotonergic reboot’. They have not so far had sex, but Travis has plans. ‘You’ll come back with your third eye,’ he says, ‘and then we’ll fuck. You’ll be glad we waited.’ At this point you may be tempted to hurl the book across the room. The self-centredness is oppressive. But persist. It rapidly becomes a very powerful read. Harden is a psychologist and behavioural geneticist, and the primary theme of Original Sin is the way in which science raises questions about morality and the law. For example, is a psychotic man who murders his wife less guilty than a sane man who does so with a clear head?

In the summer of 1992, the Times sent me to Orkney to interview the poet George Mackay Brown. He was notoriously wary of media interest – perhaps the only author ever to have asked his doctor for anti-depressants when shortlisted for the Booker prize – and I could hardly get a word out of him. His council flat didn’t yield much either: a sofa, a table – a Formica surface which Brown cleared of crumbs after breakfast and then wrote on till lunchtime. But behind his rocking chair, a huge banner, embroidered in bright wools, blazed out across an otherwise monochrome room: O let them be left, wildness and wet Long live the weeds and the wilderness yet.

Can artificial intelligence become godlike? Can such technology unravel the world’s great mysteries? Can everything, from love and intuition to consciousness and wonder, be replicated by computers and reduced to simply knowing the right algorithm? These are the big questions running through Sebastian Mallaby’s engaging book The Infinity Machine, which charts the rise of DeepMind, the London-based AI research firm owned by Google, and its exceptionally clever co-founder and chief executive, Demis Hassabis. The book’s narrative is centred on Hassabis’s hope to make DeepMind the first company to create AGI (Artificial General Intelligence) in which computers can match or surpass humans at virtually all cognitive tasks, and the morality of such an achievement.

In the not-too-distant future, if your T-shirt starts giving fashion advice or we’re all enslaved by a race of disease-resistant metahumans, then blame Martin Amis. More precisely, blame his obsession with Space Invaders. With a foreword by Steven Spielberg, Amis’s 1982 Invasion of the Space Invaders: An Addict’s Guide to Battle Tactics, Big Scores and the Best Machines gave intellectual heft to a pursuit – videogaming – that had hitherto been the preserve of glassy-eyed youths. His advocacy proved prescient. Over the next couple of decades, the best minds of a generation dedicated their lives to making pixellated worlds as compelling and realistic as possible.