The Atomic Bomb and the Nuclear Arms Race
In 1939, physicist Albert Einstein sent a
letter to U.S. President Franklin Roosevelt.
Photo from JewishJournal.com, October 10, 2011.
Physicist Leo Szilard, shown below, and other scientists worried tha
Early European Settlement of the Americas
Jamestown and Tobacco in Colonial Virginia
In the 16th century, Spain explored the
Americas in search of gold.
Between 1519 and 1521, Hernando Cortes
conquered the Aztecs and stole their gold.
European Claims in North America, 1700.
European Land Claims in North America, 1763.
Thomas Jefferson wanted the United States to be an agrarian
nation of independent farmers. He opposed industrialization. As
President, he p
Industrialization, Immigration, Urbanization
Changes in the 19th and early 20th Centuries
In British colonial America,
manufacturing was done by skilled
craftsmen like these coopers making
Painting by Sidney King.
Silversmiths like Paul
Christopher Columbus and the Columbian
The voyages of Columbus changed forever
the old world and the new.
Columbus first landed on Guanahani Island
on October 12, 1492.
Columbus called the island San Salvador.
Conservation and Wilderness Preservation
The Influence of John Muir
Disappearance of the American Grass Prairies
An Example of Environmental Transformation
W hen explorers Lewis and Clark reached northeastern
Kansas in 1804, they were shocked to find miles and miles
of open prairie land of tall grasses and no tr
American Environmental History An
What is environmental history?