13-th episode of 3-th season "Ancient Aliens"

What "Ancient Aliens" 13-th episode about

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 man's spectacular structures built by humans alone? Or do they bear evidence of being designed--and interconnected--by otherworldly visitors?

Episode number: 13

Episode name: "Aliens and the Secret Code"

Episode release date: 20 october 2011 at 02:00

Status: aired

Rating: 6.8