Humans have always observed their environment — from their immediate surroundings to the skies and beyond. While technological advancements have increased our powers of perception, the naked senses remain extremely limited. Commonplace observations by the unaided senses, notably UFO sightings, can be very difficult to explain. Our understanding of these phenomena is limited to speculation, anecdote, and the imperfect powers of human perception and recollection.
There have been documented UFO sightings in the United States since the late 19th century, before manned flight. Today, tens of thousands of UFO sightings are reported nationwide every year. Depending on weather conditions and the possibility of spending leisure time outdoors, UFO sighting levels vary by state.
In a self-published book, “UFO Sightings Desk Reference,” authors Cheryl Costa and Linda Miller Costa aggregate reports from two databases to highlight how sightings vary over time and between states. 24/7 Wall St. reviewed the number of UFO sightings between 2001 and 2015 in each state.