Investigators circle the globe in search of evidence in their quest to determine whether life on Earth began in outer space and if aliens influenced mankind in ancient times.
Did extraterrestrial beings visit Earth and share information about technology and influence human religions?
And more importantly, if aliens visited the planet before, will they return?
Alien theorists believe that the answer to both questions is a resounding yes.
Ancient Aliens S14E05: They Came from the Sea
Lurking in our oceans are creatures that defy explanation. Octopuses that can edit their own DNA.
Animals that can regenerate their entire brain. Jellyfish that can literally live forever.
Were they delivered to Earth by extraterrestrial beings?
Might our oceans be acting as a giant petri dish for alien genetic experimentation?