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Did You Know?
In Did You Know? the National Geographic magazine team shares extra information we gathered to expand your knowledge of our featured subjects.

The basenji, a compact hunter whose ancestry is depicted in Egyptian tombs 5,000 years old, is the only dog that does not bark. It isn’t mute however. It often chortles or yodels, even snarls, and it has other unusual characteristics. Like the wolf, another non-barker, the basenji can only be bred once a year, not twice like most dogs.

—Jeanne E. Peters