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What is this UFO spraying?! - Ancient Aliens

UFO emitting a mysterious spray as it flies

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4:30

Chile has the highest number of UFO sightings of anywhere on Earth. Now, incredible footage of a strange craft has people asking again about the reasons why. Historians and experts investigate various events, legends and texts throughout history that may contain evidence of contact between humans and extraterrestrial life. Ancient Aliens examines 75 million years of the most credible alien evidence here on Earth: from the age of the dinosaurs, to ancient Egypt, to the skies over the western desert in the present day US, ancient cave drawings of strange creatures, an asphalt-like substance in an Egyptian pyramid made from the remains of unidentified creatures, continued mass sightings in the USA.