Stephen uncovers a menace in Florida and talks to Ed Rendell about leaving office by choice.

Some want the dollar to be converted back to gold, and Geoffrey Canada advocates for education reform.

America's fruit supply is in danger, and Atul Gawande wants to reduce health risks in hospitals.

Neil deGrasse Tyson explains how tides work, and Robert DePinho wants to reverse the aging process.

Stephen violates the Constitution, and Fen Montaigne talks about Antarctic penguins.

Stephen picks this year's Grammy winners, and Chris Hughes starts a site for Jewish sumo wrestlers.

50 Cent makes $8 million on Twitter, and Bernard-Henri Levy discusses public intellectualism.

Hitler delivers a moving speech in Tucson, and Stephen pictures Kevin Spacey naked with rose petals.

Stephen unveils a new portrait of himself and talks to Sherry Turkle about alienating technology.

Stephen looks at education reform and assumes Cornel West's book is about Obama joining the circus.

Stephen gets a present from Afghanistan and talks to Ron Reagan about his memoir.

Christine Todd Whitman discusses state budget shortfalls, and Chris Matthews defends JFK's legacy.

House Republicans repeal health care to create new jobs, and Stephen talks to Charlie Rose.

Stephen covers home appliance safety and talks to Amy Chua about her controversial book.

Michael Waldman rates the State of the Union, and Christine Yvette Lewis fights for domestic workers.

Stephen wonders if ESP exists and asks Brian Greene if there is a universe where people buy books.

There's a breakthrough in taser technology, and Dr. Paul Offit discusses the importance of vaccines.

Leslie Dach confirms Wal-Mart's collaboration with Obama, and Michael Lewis discusses Wall Street.

America must break its dependency on foreign turmoil, and Sean Dorrance Kelly discusses the sacred.

Stephen previews the Super Bowl and talks to Jane McGonigal about video games.

Hosni Mubarak steps down onto a pillowy mound of money, and LCD Soundsystem performs.

President Twitter Bird will lead Egypt, and David Albright talks about Iran's computer virus.

Rupert Murdoch takes a new approach to journalism, and Eric Foner talks about Abraham Lincoln.

Stephen poses for Project, and Jeffrey Leonard calls out big companies' late payment policies.

Rick Santorum complains about his Google problem, and Eugene Jarecki dispels the myths of Reagan.