<http://schema.org/alternativeHeadline>
"From how much your eye weighs to what's in a tear drop, this insightful infographic has you covered with everything you ever wanted to know about the human eye."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/health/fitness-well-being/blogs/50-insane-facts-about-the-eye>