The Hadza people are a true rarity: They are some of the last hunter-gatherers on Earth and the only tribe of their kind in Northern Africa. For thousands of years, they've manage to survive in ...

Tudor Parfitt, the protagonist of the NOVA documentary "Lost Tribes of Israel," made a journey through southern Africa to study the unusual traditions of a black African tribe called the Lemba.

To the several tribes who revere American bison — they ... White bison in nature are another level of rare, with none known in Yellowstone — the continent's largest wild reserve of the ...