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Welcome to the Science Podcast for March 20, 2015.

I'm Suzanne Bard, filling in for Sarah Crespi.

In this week's show, we have Emily Kahn over up first with some online news stories, and then we hear

from Nicholas Karell about the future of robotic materials.

Support for the science podcast is provided by AAAAS, the American Association for the

Advancement of Science, advancing science, engineering, and innovation throughout the world for the

benefit of all people.

AAAS, the Science Society.

Now we have Emily Conover, Sciences News Intern.

She's here to talk about some recent online stories.

I'm Suzanne Bard.

How life got started on Earth and then kept going,

has Vexed scientists for a long time. Even if you have something resembling in early form of life,

it's got to have a way to replicate itself, like RNA or DNA. Otherwise, it gets sent back to

square one. But since RNA and DNA make proteins and cells need proteins to copy RNA and

DNA, this produces a chicken and egg problem. And protocells also need some kind of membrane to

...