University of Wisconsin in the context of "University of Wisconsin–Madison Arboretum"

Glenn Thomas Trewartha (1896 – 1984) was an American geographer and climatologist of Cornish American descent. He is best known for his eponymous Trewartha climate classification, an expanded and modified version of the Köppen–Geiger system.

He graduated from the University of Wisconsin–Madison, with a Ph.D. in 1924. He taught at the University of Wisconsin.

Aldo Leopold (January 11, 1887 – April 21, 1948) was an American writer, philosopher, naturalist, scientist, ecologist, forester, professor, conservationist, and environmentalist. He taught at the University of Wisconsin and is best known for his book A Sand County Almanac (1949), which has been translated into fifteen languages and has sold more than two million copies.

Leopold was influential in the development of modern environmental ethics and in the movement for wilderness conservation. His ethics of nature and wildlife preservation had a profound impact on the environmental movement, with his ecocentric or holistic ethics regarding land. He emphasized biodiversity and ecology and was a founder of the science of wildlife management.

Hafizullah Amin (Dari/Pashto: حفيظ الله امين;‎ 1 August 1929 – 27 December 1979) was an Afghan communist head of state, who served in that position for a little over three months, from September 1979 until his assassination. He organized the Saur Revolution of 1978 and co-founded the Democratic Republic of Afghanistan (DRA), ruling Afghanistan as General Secretary of the People's Democratic Party.

Born in the town of Paghman in Kabul Province, Amin studied at Kabul University and started his career as a teacher before he twice went to the United States to study. During this time, Amin became attracted to Marxism and became involved in radical student movements at the University of Wisconsin. Upon his return to Afghanistan, he used his teaching position to spread socialist ideologies to students, and he later joined the People's Democratic Party of Afghanistan (PDPA), a new far-left organization co-founded by Nur Muhammad Taraki and Babrak Karmal. He ran as a candidate in the 1965 parliamentary election but failed to secure a seat, but in 1969 became the only Khalqist elected to parliament, increasing his standing within the party.

The Walkway over the Hudson (also known as the Poughkeepsie Bridge, Poughkeepsie Railroad Bridge, Poughkeepsie–Highland Railroad Bridge, and High Bridge) is a steel cantilever bridge spanning the Hudson River between Poughkeepsie, New York, on the east bank and Highland, New York, on the west bank. Built as a double track railroad bridge, it was completed on January 1, 1889, and formed part of the Maybrook Line of the New York, New Haven and Hartford Railroad.

The bridge was removed from service on May 8, 1974 after damage from a tie fire. It was listed on the National Register of Historic Places in 1979, and its entry updated in 2008. The bridge was designated as a National Historic Civil Engineering Landmark by the American Society of Civil Engineers in 2009.