At age twenty-seven, physicist Philip Morrison joined the Manhattan Project, the code name given to the U.S. government's covert effort at Los Alamos to develop the first nuclear weapon. The Manhattan Project was also the most expensive single program ever financed by public funds. In this video segment, Morrison describes the charismatic leadership of his mentor, J. Robert Oppenheimer, and the urgency of their mission to manufacture a weapon 'which if we didn't make first would lead to the loss of the war." In the interview Morrison conducted for War and Peace in the Nuclear Age: 'Dawn,' he describes the remote, inaccessible setting of the laboratory that operated in extreme secrecy. It was this physical isolation, he maintains, that allowed scientists extraordinary freedom to exchange ideas with fellow physicists. Morrison also reflects on his wartime fears. Germany had many of the greatest minds in physics and engineering, which created tremendous anxiety among Allied scientists that it would win the atomic race and the war, and Morrison recalls the elaborate schemes he devised to determine that country's atomic progress. At the time that he was helping assemble the world's first atomic bomb, Morrison believed that nuclear weapons 'could be made part of the construction of the peace.' A month after the war, he toured Hiroshima, and for several years thereafter he testified, became a public spokesman, and lobbied for international nuclear cooperation. After leaving Los Alamos, Morrison returned to academia. For the rest of his life he was a forceful voice against nuclear weapons.

This course is an introductory subject in the field of electric power systems and electrical to mechanical energy conversion. Electric power has become increasingly important as a way of transmitting and transforming energy in industrial, military and transportation uses. Electric power systems are also at the heart of alternative energy systems, including wind and solar electric, geothermal and small scale hydroelectric generation.

Ohm’s Law is V = IR, where V = voltage, I = current, and R = resistance. Ohm’s Law allows you to determine characteristics of a circuit, such as how much current is flowing through it, if you know the voltage of the battery in the circuit and how much resistance is in the circuit. Created by Sal Khan.

The purpose of this lesson is to show learners how to keep a nature journal. How to reflect, respond, and question the observations they see in the world.

The purpose of this lesson is to show learners how to keep a nature journal. How to reflect, respond, and question the observations they see in the world.

This art history video discussion looks at the reconstruction of the "Ishtar Gate and Processional Way", Babylon, c. 575 B.C.E., glazed mud brick (Pergamon Museum, Berlin).

This essay looks at Italian Futurism. It includes a short video featuring a work by 19th-century scientist and photographer Étienne-Jules Marey, whose chronophotographic (time-based) studies depicted the mechanics of animal and human movement.

This art history video discussion looks at a Byzantine panel with archangel, Ivory leaf from diptych, c. 525-50, 16.8 x 5.6 x 0.35 in. (42.8 x 14.3 x 0.9 cm), probably from Constantinople (modern Istanbul, Turkey), (British Museum, London).

This art history video discussion looks at Jackie Winsor's "#1 Rope", 1976, wood and hemp, 40-1/4 x 40 x 40 inches (SFMOMA, San Francisco).

This art history video discussion looks at a Japanese Negoro ware ewer, Negoro workshop, Muromachi period (1392--1573) to Momoyama period (1573--1615) second half of 16th century, lacquered wood, Wakayama prefecture, Japan (Portland Art Museum).

This art history video dicussion examines Jasper Johns' "Flag", 1954-55, encaustic, oil and collage mounted on plywood, three panels, (MoMA).

This art history video discussion looks at Alexej von Jawlensky's "Young Girl in a Flowered Hat", 1910, oil on cardboard (Albertina, Vienna).

This art history video discussion looks at John Roddam Spencer Stanhope's "Thoughts of the Past" exhibited 1859, oil on canvas (Tate Britain, London).

This art history video discussion examines Joseph Beuys' "Table with Accumulator (Tisch mit Aggregat)", 1958-85, Tate Modern, London.

Ibn Battuta is considered one of the world's greatest travelers. During the 14th century, he traveled an estimated 75,000 miles across most of the Eastern Hemisphere, three times farther than Marco Polo, in search of knowledge and for the love of travel. In today's world, this encompasses over 40 countries. To share the learning and research so highly valued by Islamic culture, the Sultan of Morocco, Abu Inan Faris, wanted Ibn Battuta's worldwide travels records and published when he returned home to Morocco after almost 20 years. Buttuta's reminiscences where chronicled in a jourla called The Rila and documents this enormous achievement. Ibn Battuta's journey gives us a first-hand account of life in the 14th-century Muslim world, while offering a glimpse of the world through the perspective of an education "cosmopolitan." The original book, handwritten in Arabic, can be viewed today at the National Library in Paris.

In this art history video discussion Dr. Beth Harris and Dr. Steven Zucker consider Fernand Khnopff's "I Lock the Door Upon Myself," 1891. Neue Pinakothek, Munich.

They disucss the Symbolist painters and a poem by Christina Rosetti.

ZOOM guest Amy wants to be a meteorologist and volunteers at a weather observatory. In this adapted video segment, she shows us instruments used to predict the weather and describes how air pressure affects weather patterns.

This art history video discussion examines Ernst Ludwig Kirchner's "Street", Dresden, oil on canvas, 1908 (MoMA).

This art history video discussion looks at Paul Klee's "Twittering Machine (Die Zwitscher-Maschine)", 1922, watercolor, ink, and gouache on paper (MoMA).

This art history video discussion examines Gustav Klimt's "Death and Life", 1910, reworked 1915, oil on canvas, 178 x 198 cm (Leopold Museum, Vienna).