Wildhood: The Epic Journey from Adolescence to Adulthood in Humans and Other Animals, by Barbara Natterson-Horowitz and Kathryn Bowers Scribner hide caption

Franz Boas. ullstein bild Dtl./ullstein bild via Getty Images hide caption

Late Migrations: A Natural History of Love and Loss, by Margaret Renkl Milkweed hide caption

From Giants of the Monsoon Forest: Living and Working with Elephants by Jacob Shell W.W.Norton & Co. hide caption

Underland: A Deep Time Journey, by Robert Macfarlane W.W.Norton & Co. hide caption

Mama celebrates her 50th birthday on May 3, 2007, with fruit and vegetables at the Burgers Zoo in Arnhem, Holland. AFP/Getty Images hide caption

Band-e Haibat lake at Band-e Amir National Park. MCT via Getty Images hide caption

In Search of the Canary Tree, by Lauren E. Oakes PR hide caption

An industrial farm affected by flooding from Hurricane Florence in Duplin County, N.C. Jo-Anne McArthur/We Animals hide caption