What are aliens and UFOs?

ANSWER
An alien is a form of Extraterrestial life from outer space. It is unknown if such forms of life excised or ever excised. There are many different kinds of such "alien" sightings around the world. The most common type are called "greys". Greys have a humanoid kind of body, and had more than 2,000 sightings worldwide. There have been many evidence of alien creatures in the universe but not even the top scientists have found hard proof that aliens actually excised.
A UFO (short for Unidentified Flying Object) are a kind of popular phenomenon of some kind of lights through the sky noted as a alien spacecraft. The term UFO has also been used as "flying saucer" and "flying disc". UFOs have a tremendous history, going way back to year 1088, when a scholar-goverment official wrote a vivid message in his Dream Pool Essays, when he wrote about a UFO. He recorded about his testimony of an eyewitness who stated that a flying object with opening doors would shine a blinding light from its interior (from an object shaped like a pearl) that would cast shadows from trees for ten miles in radius, and was able to take off at tremendous speeds. UFOs have had more than 40,000,000 sightings worldwide and about 30,000 each day.