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Thank you. and quote science podcast to receive special offers. Welcome to the science podcast for December 19th, 2014. I'm Sarah Crespi. In this week's show,

the very last of 2014, we have David Grimm up first with a look back at some of the top stories from the year.

Then Robert Coons joins us to discuss science's breakthrough of the year's special issue.

Support for the science podcast is provided by AAAS, the American Association for the Advancement of Science,

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

and innovation throughout the world for the benefit of all people.

Now we have David Grimm, editor for our daily news site, and he's here to talk about the top

stories from this year. I'm Sarah Crespi. Okay, for each of these Dave, I'm expecting a very good explanation

for what makes them so special. And for this one, I think I can guess. First of all, it's about

the moon, which we can see with our naked eye. But why do you think a story about ancient lunar

plumbing has been such a hit? This story has two things going for it. First of all, we like stories that surprise us.

And number two, I think we still are endlessly fascinated with the moon.

It's our closest celestial partner.

And so whenever something new turns up on the moon, despite the large amount of time we've been studying it, that's pretty neat as well. Okay, so what do we learn about the moon this year? If people are familiar with the large amount of time we've been studying it, that's pretty neat as well.

Okay, so what do we learn about the moon this year?

If people are familiar with the large, in fact, the largest dark spot on the moon's

...