Is it possible nearly all advanced species have gone to great lengths to hide th...

		gridmaths on July 1, 2013 \| parent \| context \| favorite \| on: When Are the Intelligent Aliens? Is it possible nearly all advanced species have gone to great lengths to hide their existence ? The more advanced, the better at hiding? Perhaps gravity is the only radiation they cant hide, so all we could detect of them is 'dark matter'?