They have even identified a cloud of water, less than a light year across, in the constellation Orion. As a researcher once remarked: if they exist they have shown little willingness to cooperate with human investigators. there is even evidence suggesting that they deliberately try keep humans in the dark about their activities and nature. but then a large number of alien encounters have left hard evidence/photographs, instrument readings that have recorded the flight of UFOs and human experiences. There are a lot of eminent people who insisted that aliens are real and support their claim with a lot of convincing examples, but still there is no seen evident. So, the question again do aliens/extraterrestrial exists ?
The article Do Aliens Exist by Munazza Siddiqui, based in those evaluations Dr. Walther Riedel, once chief designer and research director at the German rocket centre, said: I am completely convinced that they (flying saucers) have an out-of-the-world basis. This statement was based on four vital observations: first, the skin temperature of the ships operating under the observed conditions would make it impossible for any terrestrial structure to survive. The skin friction at those speeds and at those altitudes whould melt any metal or nonmetal available; second, think about what the centrifugal force, in a few minutes of the high acceleration at which they fly and manoeuvre, would do to the crew and their blood; third, there are many occurrences where they have done things that only a pilot could perform but no human pilot could stand; and fourth, in most reports there has been lack of visible jets.
Most observers have reported that such ships have been without visible flame and no trail. If it would be any known type of jet, rocket, piston engine or chain/reaction motor, there would be a very clear trail at high altitude. Also in the article claimed that there might be a probability that aliens visited earth and landed in Egypt, dated back to around 10500 B.C.E 8000 B.C.E. and that the great pyramids and sphinx where advance builds, but unrecorded in the pharos civilization at the time. Also stated that the great pyramids are three sides as the three stars of orions belt reflects the interest of that culture in astronomy. This is also supported by findings at stonehenge, where it has been established that wooden to term poles, dated as far back as 8000 B.C.E., are a short of astronomical marker, a forerunner to the stone observatory built in 2700 B.C.E.
There are no evidence based on the pharos records that the pyramids were meant to be used as a tombs. The dating of the Giza pyramids to 10450 B.C.E. brings in the possibility that all the later pyramids were poor copies made by the pharos after discovering that food and humans bodies didnt decay in them. There is no debt that the Great pyramids are undoubtedly one of the oldest structures in Egypt, basically there are no records in Egypt that gradually development of architectural knowledge and skills by the pharos. Another prove is Navai, Uzbekistan has a mysterious rock, that estimated to be 3000 years old. this mysterious rock has images of men wearing respirators. so could the object with rays be space rocket? well, scientist also proved that ancient cave paintings in Prince Regent Valley in Kimberley, Australia nearly have tales of flying objects.
As for life out in space a research approved that mars is said to have a very harsh environment, but there are some microbes on earth that can easily survive in places with harsh conditions. Incoming signals was recorded on August 15, 1977 during a search that was carried at the Big Ear Observatory (BEO) at the Ohio State University that evidence has raised alarm, but it has often been dismissed as human interference. There is a possibility that aliens/extraterrestrial are invisible, and might be the same like Jinns. Meaning that aliens are probably out there in space or maybe are visiting earth at the moment, but we just cant see them, because they are invisible. Also we might be we are invisible to them.
The best evidence in this respect can be seen at Baalbek, Lebanon, where a huge platform was constructed in ancient times with stones weighting hundreds of tons ” an accomplishment very difficult to duplicate even today with all the modern technology. Mythology links this sacred site of Baalbek with the sun god helios, who parked his chariot on this platform. There are the Nazca Lines in Peru, properly visible from air, which also tells of a similar legend. All these structures and their similarity to the ones in Mars lead to the question whether the aeronautical technology of the gods included space travel.
As a final statement, many ancient evidence can lead us to stating that a huge percentage can make us believe in the existence of extraterrestrial. We live in a three dimensional world with time being termed as the fourth, but why should we suppose that any living being in any other planet has to be in these dimensions only. Maybe there are more dimensions, complimenting their existence in their world. The probabilities are endless. If there are extraterrestrial, then we have already lost a lot of time by not accepting their presence. There is truth waiting to be discovered outside the circle of our compact lives. If only we would open up to the possibility that we might not be alone in this huge universe.