Joseph Stromberg for Smithsonian:
For all of modern history, a small, carnivorous South American mammal in the raccoon family has evaded the scientific community. Untold thousands of these red, furry creatures scampered through the trees of the Andean cloud forests, but they did so at night, hidden by dense fog. Nearly two dozen preserved samples—mostly skulls or furs— were mislabeled in museum collections across the United States. There’s even evidence that one individual lived in several American zoos during the 1960s—its keepers were mystified as to why it refused to breed with its peers.