Terry Gross

Jimmy Wales helped create Wikipedia, the interactive online encyclopedia founded in 2001. Users write and edit Wikipedia entries themselves; the site also has a dedicated corps of editors. There are often "edit wars" over entries — some, including the one headlined "2006 Lebanon War," have been edited and then re-edited thousands of times — and Wikipedia's accuracy has been questioned by some professors and colleges, who forbid students to cite it as a source. But Wikipedia, with versions in 250 languages, is one of the top 10 sites on the Internet.

MTV's new Thursday-night sketch-comedy series Human Giant got its start as a collection of Web shorts, and the rise of MySpace and the viral-video explosion helped it develop a big following online. Terry talks with Aziz Ansari, Rob Heubel and Paul Scheer, three of the comics who power the show's alterna-comedy antics.

Sari Nusseibeh is the president of and a professor of philosophy at al-Quds University, the only Arab university in Jerusalem. He's written a memoir, Once Upon a Country: A Palestinian Life; he's also co-author of the People's Voice Initiative, aimed at building grassroots support for a two-state solution in the Middle East. Until December 2002, he was the representative of the Palestinian National Authority in Jerusalem.