94-year-old man has spent decades building museum of human history in the desert

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Located in a 1,052-hectare (2,600 acres) town in California's Sonoran Desert, the Museum of History in Granite features 717 engraved granite panels that tell the history of humanity. Jacques-André Istel, founder of the museum, who has been working on this project since 1986, hopes to preserve history for future scholars and visitors.