<http://schema.org/alternativeHeadline>
"The algae look like little petri dishes or footballs, depending on the species, and spend most of their lives drifting on water currents."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/wilderness-resources/stories/massive-eruption-launched-slimy-algae-army-into-the-sky>