"Based on data from the National UFO Reporting Center, the map displays over 90,000 reports of UFO sightings dating back to 1905.
Each circle corresponds to a reported UFO, with the size representing the number of reports received."
"Based on data from the National UFO Reporting Center, the map displays over 90,000 reports of UFO sightings dating back to 1905.
Each circle corresponds to a reported UFO, with the size representing the number of reports received."