Thousands of metallic spheres have been spotted all over the globe. Many of those sightings remain unidentified. In this episode of "Reality Check," Ross Coulthart sits down with author Patrick Jackson. Jackson, a paranormal researcher, has been studying this phenomena, which he calls the “sphere network.” The pair discuss Jackson’s theories, possible origins of the spheres and if they are operated by human or nonhuman intelligence.

Watch "Scientist explains unidentified aerial phenomena | Reality Check":    • Scientist explains unidentified aerial phe...