Alienígenas do Passado Temporada 3 Episódio 13

Name: Aliens and the Secret Code
Released: October 19, 2011
Duration: 44m

Megalithic monuments linked together by electromagnetic energy... Prehistoric ruins arranged across vast distances in straight lines... And advanced mathematics carved into landmarks more than 5000 years ago. Were ancient mans spectacular structures built by humans alone? Or do they bear evidence of being designed - and interconnected--by otherworldly visitors?