Are There Space Aliens?

Do you expect to be the only living being in the universe? 400 years ago we "knew" the planet was flat, now we know it is obviously not. How much time and history went by before Europeans discovered black people in Africa? Now all of a sudden, we wonder the possibilities of life on other planets? We have cave drawing from all over the world showing what looks like astronauts and space ships flying/landing. The cave drawing descriptions are not that far off from how there are described today. Our history with technology has a story, In 1969 we landed on the moon, 100 years before that America/New England was recovering from the revolutionary war. In the 1940's supposedly a flying saucer crashed in the New Mexico Desert. The following years technology sky rocketed....   Coincidence? Maybe not...