The first documented alien encounter happened in 1947. A businessman, Kenneth Arnold, was flying his small plane when he encountered nine objects, traveling at a high rate of speed in the Ranier, Washington area. He described them as moving similar to saucers on water, and the term 'Flying saucers' was born.
Dates back to the 1940s in Roswell, New Mexico.
You can read in Ezekiel in the King James version of The Bible about vehicles in which people were seen through windows in them. They are described also of having been made of polished bronze or being of an amber color. They had four wheels within a wheel that didn't go on their sides like on an ox cart. It turned not where it went unlike a horse or donkey that turns it's head where it wants to go. God has such a vehicle upon which his altar is carried. Is it possible that the so-called UFO's that are reported throughout the world are the vehicles that the angels use; or possible the fallen angels as well - ?
No verifiable evidence has ever been presented to indicate that any alien has ever landed on earth.
However, complex organic molecules have been shown to exist in meteorites, so some of the origins of organic life could be called "alien". It has also been suggested that life itself was brought to earth by asteroids or meteorites (see exogenesis and panspermia), making all life inherently "alien".
These hypotheses have no evidence backing them, of course, and are not really useful. It really doesn't answer the question of how life began, it just kicks the question to another planet, without addressing how it came about *there*. An explanation that doesn't explain is not valuable to science. In science, the simplest explanation that fits the facts is preferred. The simplest explanation for life on Earth is that it began here on Earth.
So in answer to your question... we are still waiting.
No real sightings of space aliens have ever been documented.
All planets other than Earth could be considered alien. Earth is the only planet known to harbor life.
The astronomer, Oglivy
"UFO" does not mean alien spaceship. So far there is no scientific reason to think even one alien spaceship has ever landed on Earth. UFO just means "I saw something in the sky and I personally don't know what it was."
There are no authentic and verifiable instances of any alien coming to earth. That being so there are no details of such an incident with the exception of conspiracy theories or fantasy tales.
The alien land bill was a law passed in 1913 that prevented Japanese people from owning land in California
There have been many speculations on if an alien being has been on earth. There have been no confirmed reports on aliens on earth.
When the metric alien landed on Earth, he said, "TAKE ME TO YOUR LITER"
No where
Unsealed Alien Files - 2012 II Alien Earth 2-12 was released on: USA: 4 November 2013
Dave
The cast of Alien Arrives on Earth - 2003 includes: Luigi Cozzi as himself
I think a forget-me-not