No one knows
The likelihood of other forms of intelligent life existing on other planets is difficult to determine definitively. However, given the vastness of the universe with billions of galaxies and planets, many scientists believe it is probable that other forms of intelligent life could exist elsewhere. Ongoing research in astrobiology and the discovery of exoplanets have fueled interest in the search for extraterrestrial life.
Albert Einstein did express openness to the possibility of intelligent life on other planets, given the vastness of the universe. He acknowledged that the enormity of space and the number of stars suggest that life could exist elsewhere. However, he did not provide definitive evidence or strong opinions on the matter, focusing more on scientific inquiries than on speculative beliefs.
There are probably a billion stars in our galaxy, and probably a billion galaxies in the universe. We already know what there are planets orbiting many other stars; if there are planets around only 1% of the stars, that's still 100 billion planets. If only 1% of those planets are habitable, that's a billion habitable planets. If only 1% of those planets HAVE life, that's 10 million planets with life. If only 1% of the planets that have life have highly-developed life forms, then there are 100,000 planets with highly developed life forms. If only 1% of those planets have intelligent life, that's still 1,000 planets in the universe that have intelligent life; "aliens". We have NO IDEA if there are any other planets that have life, or intelligent life in the universe, or if those aliens - if any exist - might be willing or able to communicate with us. But I would like to think so.
No, most religious systems can accept the existence of intelligent life (and death) on other planets
As of now, there is no definitive evidence or consensus within the scientific community about the existence of intelligent life on other planets. While many scientists believe that it is possible, no confirmatory discoveries have been made. The search for extraterrestrial intelligence continues through initiatives like the Search for Extraterrestrial Intelligence (SETI) program.
Since there is no evidence of intelligent life beyond Earth an accurate answer does not exist. However seeing as intelligent life is possible, I can narrow the likelyhood of intelligent life in our galaxy to be between 0 and 100%.
Scientists say that life can be expected to have evolved on other planets, wherever the environment is not so hostile that life can not be supported. They say that in this vast universe there must be many such planets that can support life and that some are likely to support intelligent life forms even more advanced than humans. Whether we believe that our God created the life on other planets is a matter of human faith. No doubt any intelligent life on other planets will never have heard of Earth's gods.
At this time we have no evidence of any extraterrestrial life.
I doubt if Richard Dawkins believes in aliens in the sense of intelligent beings from outer space who have visited our earth. I think he does believe that, somewhere out there in the billions of planets that exist in other solar systems, there must be other life forms, some of which will be at least as intelligent as we are.
Life probably does not exist on any of the known planets (except earth). But if life does exist on one of those planets, it would probably be on Mars. Venus is way too hot, Mercury does not have an atmosphere, and the other four planets are made up almost entirely of gas.
Yes, other planets do exist in our galaxy and beyond. There are thousands of confirmed exoplanets that have been discovered orbiting other stars in the Milky Way galaxy. Some of these planets may have conditions that could potentially support life.
The only one that humans are currently aware of is Earth. No other planet in our own solar system has intelligent life, and there is no conclusive evidence as of yet that intelligent life exists elsewhere.