<http://schema.org/url>
<http://phenomena.nationalgeographic.com/2012/06/07/how-mantis-shrimps-deliver-armour-shattering-punches-without-breaking-their-fists/>
<http://phenomena.nationalgeographic.com/2012/06/07/how-mantis-shrimps-deliver-armour-shattering-punches-without-breaking-their-fists/>