<http://schema.org/alternativeHeadline>
"Penguins are some of the most beloved bird species in the world. So what are we doing to protect them? Get inspired by these conservation successes."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/animals/stories/everybody-likes-penguins-5-inspiring-conservation-stories>