Life on Antarctica’s Cuverville Island can be harsh. Colonies of orange-billed gentoo penguins scale its often windy, snow-covered slopes, building nests for their young with small stones and pebbles they gather from the island’s rocky outcrops. Patches of moss and lichen grow sparingly, some of the few signs of flora on an otherwise barren land. But on one day in February, an unusually out-of-place sight appeared: a man sitting in a chair. “I’d never come across someone wanting to bring a camping chair ashore in Antarctica before,” says Jonathan Fuhrmann,…