<http://schema.org/about>
"Some do it with photo trips, others on nature Safari. Cool types do it on scientific missions to the Antarctic. Teachers do it with turtles. Not greening their sex lives, but seeing the earth's rarest critters"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/travel/6-ways-to-see-endangered-species-without-endangering-them-more/page2.html>