<http://schema.org/alternativeHeadline>
"A new study, dubbed the Red Queen Hypothesis, finds that when C. elegans worms reproduce asexually, parasites easily drive them to extinction."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/animals/stories/sex-may-have-evolved-from-parasites>