<http://schema.org/alternativeHeadline>
"Researchers look at bone growth as a good indicator of metabolisms, and they found that dinosaur bones grow at a rate in between warm- and cold-blooded metabolisms we know today."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/animals/stories/warm-or-cold-dinosaurs-had-in-between-blood>