“Anyone can love the mountains, but it takes a soul to love the prairie,” wrote Willa Cather, author of “O Pioneers!,” the saga of early westward struggles and the kind of character it took to ...

Confused about native, non-native, introduced, and invasive species? This guide breaks down the definitions, explains how scientists classify them, and explores real-world examples like zebra mussels ...

Prior to the arrival of the first European settlers early in the 17th Century, an estimated 50 million Native Americans tilled the land in the area that became the United States, gathered food in the ...

The tiny native oysters of San Francisco Bay managed to outlive the Gold Rush, bay-shore development and decades of punishing pollution. New research shows they have a fighting chance to survive ...