For the archaeologist Jesse Casana, midnight is the best time to find things underground. “It’s always in the middle of the night, sometime between late and very late,” he says. Casana, an anthropology professor at Dartmouth, has been testing a new thermal imaging drone for archaeological research. “It’s a very weird kind of archaeology because usually we go and spend weeks and weeks working in the sun. In this case we just go in the middle of the night—once.” The advantage of late-night archaeology is that big, underground objects retain…
