Talk of The Nation

Egyptian President Mohammed Morsi authorized the military to secure the country ahead of a controversial referendum on a draft constitution — a move that some compared to martial law. The opposition is split over what to do — vote down the constitution or boycott the vote altogether.

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IRA FLATOW, HOST:

Next up, who didn't, at one time or another, now think about it, who didn't want to be an astronaut when they were growing up, especially those of us, the children of the space-age space race? Well, for those of us whose lives are a bit more Earthbound, we've got a fun edition to our Ask an Expert series. How about Ask an Astronaut? Everything you wanted to ever ask an astronaut, Flora.

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FLORA LICHTMAN, BYLINE: We're ending this hour into the sea, Ira. Could you tell?

IRA FLATOW, HOST:

Ooh, yeah. I like it.

LICHTMAN: The noise you're hearing comes from a blue whale; that's an animal that can reach 90 feet in length, which is longer than a tennis court. Biologist...

JEREMY GOLDBOGEN: Hands down, these are largest animals of all time. And so one of the questions we're interested in is how do they sustain such an extreme body mass and why don't we see anything bigger than a blue whale?

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FLORA LICHTMAN, BYLINE: Up next, more spacey news.

IRA FLATOW, HOST:

All right.

All right. Can't get enough?

Mm-hmm.

LICHTMAN: Earlier this week, NASA announced plans to launch another rover to Mars in the year 2020. And there's some buzz, there's some speculation that this one could have a wheel up on Curiosity. Maybe it wouldn't just analyze samples there but could shift them back to Earth.

FLATOW: You know, I've heard that before.

LICHTMAN: Don't be downer, Ira.

(LAUGHTER)

In Escape Fire: The Fight to Rescue American Healthcare", director Matthew Heineman exposes what he sees as flaws in the U.S. healthcare system, such as a doctor who can spend just minutes with her patients to a soldier addicted to painkillers. Colonel Chester 'Trip' Buckenmaier III, of the U.S. Army Medical Corps, describes the military's efforts to swap pain pills for alternative therapies, like acupuncture and yoga.