With global warming, the glaciers that crown our highest mountains have retreated, revealing humans who died there long ago. This respectful photo-essay opens with the story of Ötzi, found in the Alps in 1991 more than 5,000 years after his death. Deem goes on to explain how glaciers work to preserve and destroy human remains and to provide some historical background. Looking beyond Europe, he describes Inca children sacrificed on high Andean peaks, the discovery of the body of George Mallory, who died on Mt. Everest in 1924, and a man who died between 1670 and 1850 in what is now northern British Columbia whose DNA revealed connections to present-day First Nations Canadians. Clearly identified lithographs, paintings and archival photos help readers see how much has changed in these high altitudes, while maps make clear the locations of particular discoveries. Photos of skulls, mummified bodies and artifacts will fascinate readers. An intriguing read, complementing the author’s highly commended Bodies from the Bog (1998) and Bodies from the Ash (2005), with a bonus environmental message. (environmental tips, glaciers to visit, websites, bibliography, illustration credits) (Nonfiction. 10-16)