Atsuko Kawashima of Hunter College and David Ropeik, author of “How Risky Is It, Really?” on the earthquake. Plus: City Council Speaker Christine Quinn, and artist Jon Rafman on his project "The Nine Eyes of Google Street View."

Jigar Mehta and Yasmin Elayat explain their project #18DaysinEgypt. Then, Deb Roy of the MIT Media Lab on how he studied his infant son’s language development. Plus: the National Broadband Map.

Jigar Mehta and Yasmin Elayat explain their project #18DaysinEgypt. Then, Deb Roy of the MIT Media Lab on how he studied his infant son’s language development. Plus: the National Broadband Map.

Vivek Wadhwa of UC Berkeley and Rich Skrenta, CEO of Blekko, a search engine designed to tackle spam, look at Google’s changing algorithm. Then: How social media is altering the way patients tackle disease and the way lawyers select juries.

Vivek Wadhwa of UC Berkeley and Rich Skrenta, CEO of Blekko, a search engine designed to tackle spam, look at Google’s changing algorithm. Then: How social media is altering the way patients tackle disease and the way lawyers select juries.

Mother Jones' Andrew Kroll, Politico's Jennifer Epstein, and Gotham Schools’ Anna Phillips on events in Wisconsin. Katrin Verclas of MobileActive on cell phones and the Mid-East Uprisings, and Stephen Baker, author of “Final Jeopardy.”

Mother Jones' Andrew Kroll, Politico's Jennifer Epstein, and Gotham Schools’ Anna Phillips on events in Wisconsin. Katrin Verclas of MobileActive on cell phones and the Mid-East Uprisings, and Stephen Baker, author of “Final Jeopardy.”

In his new book “The Googlization of Everything” Siva Vaihyanathan takes a critical look at our uncritical embrace of the company. Plus: Queens Borough President Helen Marshall and the exploding world of DIY animation.

In his new book “The Googlization of Everything” Siva Vaihyanathan takes a critical look at our uncritical embrace of the company. Plus: Queens Borough President Helen Marshall and the exploding world of DIY animation.

Henry Blodgett of The Business Insider and Alan Mutter of the Newsosaur blog with an online journalism update. Then, the New York Times’ John Markoff on the Stuxnet worm. Plus: Gabriella Coleman of NYU on the visuals of Anonymous.