Perhaps the most puzzling question Jared Diamond encounters as he investigates animal domestication is: Why were no large mammals ever domesticated in tropical Africa? Africa, south of the Sahara, is ...

In this lesson, students build two circuits and explore how transistors function. When Bell Labs introduced the transistor in June of 1948, a spokesman proudly announced "This cylindrical object . . .

In this lesson, students search for transistor-based devices at school. They use the results of their search to explain the significance of the transistor in their lives. A transistor is a tiny device ...

Bell Laboratories, one of the world’s largest industrial laboratories and now part of Lucent Technologies, was originally the research and development arm of the giant telephone company American ...

"When God wants to speak with us, he does not avail himself of an angel but of parents." (Martin Luther) Martin Luther was named after St Martin by his parents Hans and Margarette Luther, a pair of ...

HOWARD BAHR: There were some trends in the family between 1924 and 1978 that showed dramatic change. There were others that our data suggests that things are pretty much as they were. Between 1924 and ...

BRUCE GEELHOED: Lynd came to Muncie in the 1920's with some money from John D. Rockefeller, Jr., by that point a noted philanthropist, with the Rockefeller Foundation, the Rockefeller Institute for ...

THEODORE CAPLOW: Robert and Helen Lynd went to Muncie, Indiana in 1924, with a commission to study grassroots religion. And they came back in 1925 with a marvelous study of social change, having used ...

Astrophotography has come a long way in recent years, thanks to digital cameras (which are more light-sensitive than film), digital photo processing (which can bring out the subtle details in dim ...

A program such as Martin Luther involves months of painstaking research, preparation and writing. An experienced and skilled crew including a director, producers, director of photography, audio ...

Voiceover: There have been people living in New Guinea for at least 40,000 years – much longer than on the continents of North and South America. They’re among the most culturally diverse and ...

So far, Jared Diamond has demonstrated how geography favoured one group of people – Europeans – endowing them with agents of conquest ahead of their rivals around the world. Guns, germs and steel ...