A L I E N S / A R R I V E

A UFO sightings review in the last century in the U.S.

From 1931

to

1931

The number of sightings is increasing from year 1931.

Move the slider to see this trend:

How does UFO look like?

There are 25 reported UFO shapes.

Total "light" appearing times:

16565

hover over a shape to check its reported count.

by Zhengnan Zhao, Beitong Tian，Shuran Li，Hanchun Shao