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'Crazy Ants' Spreading In The Southeastern US

In parts of the southeastern US, aggressive fire ants have been driven out by an even more recent arrival, the tawny crazy ant. Edward LeBrun, a researcher at the University of Texas at Austin, describes the newcomers and how one invasive species can out-invade another.

Having a Dog May Mean Having Extra Microbes

North Carolina State University biologist Rob Dunn and colleagues surveyed people's pillow cases, refrigerators, toilet seats, TV screens and other household spots, to learn about the microbes that dwell in our homes. Among the findings, reported in the journal PLoS One, homes with dogs had more diverse bacterial communities, and higher numbers of "dog-associated" bacteria.

Evolution Saves Cockroaches From Taking The Bait

A new study unravels the mystery of a peculiar transformation: sometime in the 1990s, the insects developed a sudden aversion to sweet-tasting poisons.

Researchers Find Bird Flu Is Contagious Among Ferrets

The virus's ability to move between these mammals might not bode well for humans. So far, it appears that H7N9 doesn't pass easily between people, but it could mutate over time and pose more of a threat.

'Morning Edition' Listeners Get Their Feathers In A Bunch

On the show Tuesday, we told you about some scientists in Canada whose research crops were destroyed by "Canadian geese." Listeners said we got the name wrong and they explained why.

African Cities Test The Limits Of Living With Livestock

Hipsters may just be discovering the joys of backyard chickens, but in African megacities, people have been bringing their animals into the slums with them for decades. That's creating a new ecosystem of animals and huge numbers of people living closely together like never before.

Washington State Butcher Spikes Pig Feed With Weed

Despite its name, the "pot pig" experiment isn't an attempt to develop a new meaty treat for stoners. Instead, a Seattle butcher is feeding marijuana seeds, stems and root bulbs to swine as a cheeky money-saving measure.