Underland: A Deep Time Journey

Nature writer Macfarlane (The Old Ways: A Journey on Foot) expands readers' horizons while delving into the various "worlds beneath our feet" in an eye-opening, lyrical, and even moving exploration. His look at the network of roots below London's Epping Forest leads into a discussion of the recent discovery that trees share nutrients with neighboring trees that are ill or under stress, a finding consistent with new ideas about plant intelligence and a "wood wide web" of interconnected plant and fungal life. In another section, Macfarlane descends more than half a mile below the Yorkshire countryside to visit "a laboratory set into a band of translucent silver rock salt left behind by the evaporation of an epicontinental northern sea some 250 million years earlier," where a physicist is searching for proof of dark matter's existence. Here, too, Macfarlane makes counterintuitive concepts fully accessible while capturing the poetry beneath the science, describing the tangible world humans perceive "as mere mist and silk" in relation to dark matter. Perhaps most importantly, he places humanity's time on Earth in a geological context, revealing how relatively insignificant it is. Macfarlane's rich, evocative survey enables readers to view themselves "as part of a web... stretching over millions of years past and millions to come," and deepen their understanding of the planet.