Talk of The Nation

NPR's Neal Conan reads from listener comments on previous show topics, including first-person shooter video games and the StoryCorps' National Day of Listening.

Egypt's president Mohamed Morsi issued a decree giving himself near absolute power. Protests followed, and Morsi walked back slightly on his claim to absolute authority. NPR's Cairo bureau chief Leila Fadel explains the evolving political challenges of Egypt's post-Mubarak era.

The sex scandals of Gen. David Petraeus and Brig. Gen. Jeffrey Sinclair have triggered public conversations about ethics, national security and leadership. These high-profile cases of infidelity have also prompted private conversations about the challenges of military marriage.

Transcript

NEAL CONAN, HOST:

This is TALK OF THE NATION. I'm Neal Conan in Washington. Last week's cease-fire between Israel and Hamas was supposed to lead to more substantial discussions, but there's been little to no movement so far. So after eight days of bombs and rockets, what's changed? The dead, of course: six Israeli and over 160 Palestinians and destruction, also one-sided.

On Dec. 21, 2012, some fear that a rogue planet will collide with Earth and destroy the planet, or that the supposed end of the Mayan calendar will lead to the obliteration of the universe.

When people have questions about these scenarios, they often turn to the Internet.

NASA astrobiologist David Morrison has taken it upon himself to enter that online conversation and answer hundreds of questions about the science of existential threats.