Geologists at the Hawaiian Volcano Observatory rely on a number of instruments to studying the volcanoes in Hawaii

Was opened in 1918, the Philips Collection in Washington, D. C. was the first museum in the Untited States devoted to modern art.

Underlying aerodynamics and all other branches of theoretical mechanics are the laws of motion who were developed in the seventeeth century.

Alike ethnographers, ethnohistorians make systemic observations, but they also gather data from documentary and oral sources.

In bas-relief sculpture, a design projects very slightly from its background, ............ some coins.

Not until Kentucky's Mammoth Cave had been completely explored in 1972 .................................

Margaret Mead studied many different cultures and she was one of the first anthropologists to photograph hers subjects

Written to be performed on a ..........................., Thomton Wilder's play Our Town depicts life in a small New England community.

The first explorer ..................... California by land was Jedediah Strong Smith, a trapper who crossed th southwestern deserts of the United States in 1826.

Alaska found the first years of its statehood costly because it had to take over the expense of services .................... previously by the federal government.