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Welcome to the Science Podcast to receive special offers. Welcome to the science podcast for April 17, 2015.

I'm Suzanne Bard filling in for Sarah Crespi.

In this week's show, we have David Grimm up first with some online news stories,

and then we hear from Evan McLean about the role of oxytocin

in mediating the relationship between people and dogs.

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 David Grimm, editor for our daily news site.

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

I'm Suzanne Bard.

Today's stories all involve organisms that have

interesting ways of making their living off the bodies of other species, dead or alive.

First, vampire bats survive by feeding on blood, but pinpointing their favorite source of the

nourishing nectar has eluded scientists until now. Perhaps that's because to do so, they needed to

look at DNA in bat poop. This sounds like a job for a certain kind of scientist, Dave.

...