Earth

This slender, gleaming novel depicts a day in the life of six astronauts at the International Space Station – but a day isn’t a day for a crew orbiting Earth at more than 17,000 miles an hour. Space ‘takes their 24 hours and throws 16 days and nights at them in return’. Weaving a line of philosophical enquiry through her luminous prose has become something of a trademark for Samantha Harvey, who probed the elasticity of time through a portrayal of Alzheimer’s disease in her prize-winning debut The Wilderness and, in All is Song, transported Socrates to the 21st century. In Orbital, her sixth book, she explores time again, especially

As humans, we are supposed to have an aversion to slime. It should repel us. Objects and organisms that might be harmful trigger feelings of disgust which keep us away. And, according to the biologist Susanne Wedlich, the common denominator of ‘wide-ranging microbial threats, covering sickness, sex, death and putrefaction’ is their sliminess. It is easy to test this theory. Google ‘slime moulds’ and note your first response. They are gross. But these organisms are worth sticking with. Japanese researchers once conducted an experiment using a slime mould and a map of the country. They put the mould on top of Tokyo and dropped food on to the city’s surrounding