Egemen Guclu's Visualization of Worldwide UFO Sightings: Geographic and Temporal Patterns via Interactive Maps, Bars, and Pie Charts
To the point
Egemen Guclu visualized a worldwide UFO sightings dataset and found that most sightings cluster in the Americas with the United States leading overall, England recording the longest single sighting, light-beam shapes being the most common, yearly counts peaking in 2012, and future sightings likely occurring in the Americas as brief light-beam events.
