In ancient Hawaii, chiefs managed the economy by creating a land division system, the Ahupua'a, which divided the islands into pie slice shapes. Each Ahupua'a covered the three main regions of the islands: the mountains, the valleys, and...

Coal in North Carolina is limited to two belts of Triassic sediment: the sporadic Dan River belt and the larger Deep River belt, which runs along the Deep River in Lee, Moore, and Chatham Counties. Read on to learn about the uses and...