Giorgio Tsoukalos, of "Ancient Aliens," one of History channel's most popular and longest-running shows, believes that all ancient civilizations were visited by extraterrestrial beings at some point.

And yes, that includes ancient Philippines.

According to him, the country has some bizarre folktales that could prove his theories that humans aren't alone in the universe.

He made the claim during a Q&A session he had with fans on History's Facebook page Thursday, after he was asked about whether he thinks that aliens have set foot in the Philippines.

"Absolutely," he replied.

He argued that legends and myths, which the Philippines have a lot of, contain hints and clues to a bigger story --to borrow his term, a "beginning." He said: "That is where I'm curious."

"I'm trying to figure out what was the initial spark of inspiration for such particular stories or legends."

He did admit, however, that he has yet to see an artifact or megalithic structures from the Philippines to support his theory.

Tsoukalos is in Manila for History Con 2018, where is one of the headlining guests alongside "Vikings" star Katheryn Winnick.

He will hold meet-and-greet session with his fans, as well as a panel where he talks more about his "ancient aliens" theory.

History Con 2018 will be held at World Trade Center in Pasay, from Friday to Sunday.