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Dodo
The dodo goes extinct. -
Henry David Thoreau
Hanry David Thoreau was born. -
John Muir
John Muir was born in Scotland. -
Henry David Thoreau
Thoreau publishes A Yankee In Canada. -
Henry David Thoreau
Thoreau publishes Walden. -
John Muir
John went to the University of Wisconson to study sscience. -
Henry David Thoreau
Thoreau dies. -
John Muir
He gave up his inventions to study nature -
Period: to
John Muir
Muir went to explore Yosemite National Park. -
John Muir
John married Louie Wanda. -
Aldo Leopold
Aldo Leopold was born in Burlington, Iowa. -
John Muir
Congress passed legislation declaring Yosemite a National Park, thanks in large part to Muir’s advocacy. -
John Muir
President Theodore Roosevelt visited Yosemite and was guided about by Muir. The two men camped under the stars in the Mariposa Grove of giant Sequoia trees, and their campfire conversation helped form Roosevelt's own plans for conserving American wilderness. The men also posed for an iconic photograph atop Glacier Point -
Rachel Carson
Rachel Carson was born. -
Aldo Leopold
Assigned to district headquarters in Albuquerque in office of grazing. -
John Muir
John Muir dies -
Aldo Leopold
Helps found game protective associations throughout the Southwest, including the Albuquerque Game Protective Association, now known as the New Mexico Wildlife Federation. -
Aldo Leopold
Accepts transfer to U.S. Forest Products Laboratory in Madison, Wisconsin as assistant director. -
Period: to
Rachel Carson
Rachel Carson attends Pennsylvania College for Women. -
Aldo Leopold
He accepts an invitation from Robert Marshall to become a founding member of The Wilderness Society. -
Aldo Leopold
Leopold publishes A Sand County Almanac. -
Aldo Leopold
Becomes chair of a new Department of Wildlife Management at the University of Wisconsin. -
Rachel Carson
Rachel Carson publishes a book called Under the Sea-wind. -
Aldo Leopold
Aldo dies by a heart attack. -
Rachel Carson
Rachel Carson published The Sea Around Us. -
Rachel Carson
Carson wins National Book Award for Non-fiction for The Sea Around Us. -
Rachel Carson
The Edge of the Sea was published by Rachel Carson. -
Agent Orange
Agent Orange is sprayed in Southeast Asia, exposing nearly 3 million American servicemen to dioxin, a probable carcinogen. -
Rachel Carson
Carson writes Silent Spring. -
Wilderness Act
Wilderness Act passed, which protects wild areas in the United States. -
Rachel Carson
Rachel Carson dies. -
Greenpeace
Greenpeace founded. -
Environmental Protection Agency
Environmental Protection Agency (EPA) created. -
Earth Day
First Earth Day celebrated. -
Ozone hole
Ozone hole observed over Antarctica. -
Exxon Valdez
Oil tanker Exxon Valdez runs aground in Prince William Sound, Alaska, spilling 11 million gallons of oil.
