<http://schema.org/mainEntityOfPage>
<http://www.popularmechanics.com/space/deep-space/a3282/the-search-for-aliens-is-just-getting-started-16584156/True>
<http://www.popularmechanics.com/space/deep-space/a3282/the-search-for-aliens-is-just-getting-started-16584156/>