Many have asked the question: "How do we understand the world around us?" Truly, it is a question that has animated discussion from Beijing to Bogota over the millennia, and it's one that motivates Melvyn Bragg, host of the BBC program "In Our Time". Drawing on guests from around the world, Bragg takes on science, culture, religion, philosophy, and history. Visitors can click on the "Explore...

Officially released on the Web last week, this impressive digital archive features the writings, scholarship, and thoughts of Albert Einstein, one of the 20th century's greatest scientists. The site allows visitors to view and browse 3,000 high-quality digitized images of Einstein's writings, ranging from his travel diaries (many of which are in German) to his published and unpublished scholarly...