<http://schema.org/alternativeHeadline>
"As pollution, habitat loss, global warming and disease increase the number of threatened and endangered species, attempts to protect them are more crucial than ever. That\u2019s where the Frozen Zoo comes in."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/green-tech/research-innovations/stories/all-creatures-great-and-small>