The Sirens of Mars: Searching for Life on Another World by Sarah Stewart Johnson - review by Andrew Crumey

Andrew Crumey

Red but Not Dead

The Sirens of Mars: Searching for Life on Another World


Allen Lane 288pp £20 order from our bookshop

When Sarah Stewart Johnson was eleven, her father took her to the medical laboratory where he worked and showed her a 141-year-old toenail. It came from one of America’s less well-known presidents, Zachary Taylor, who’d been exhumed so that his untimely death could be investigated. Johnson saw the sophisticated machines that would determine by chemical analysis if the unfortunate president had, as rumoured, been poisoned. It turned out he hadn’t, but for Johnson the experience provided a foretaste of her own future career: ‘Although I could sense the enormous power of these instruments, I had no inkling then of their potential as tools for space science.’ Professor Johnson is part of the science team monitoring NASA’s Curiosity Mars rover, a car-sized buggy that has been trundling across the planet since 2012. After reading her fascinating, elegantly written book on the red planet, I’m glad she didn’t become a chiropodist instead.

Johnson begins with early telescopic sightings of Mars, from Galileo’s first glimpse of the planet, appearing in the sky like a poppy seed, to Schiaparelli’s observation in the 1870s of threadlike lines speculated to be canals made by an advanced civilisation. Sceptics said they were an illusion. To demonstrate this,

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