Decades of debunking: One man's quest to explain UFOs without aliens

The deployment of SpaceX's Starlink satellites has been linked to the increase in UFO sightings. Photos: Gene Blevins/ZUMA Press Wire/dpa

He has been dedicated to UFO research for decades.

The first thing Hansjurgen Kohler insists on clarifying as we begin our conversation is that at his place of work, the Central Research Network for Extraordinary Celestial Phenomena (Cenap), they don't believe aliens are lurking somewhere on Earth.