Do you believe there are UFOs and aliens?

This topic should be based on objective scientific observation that reaches testable conclusions, no evidence has been produced that's testable as proof of aliens or UFO'S (alien spacecraft).
UFO's and aliens are actually quite different and should not be lumped together IMHO.
UFO's for example certainly exist in the sense that an object can be observed that hasn't been identified by the viewer like a new type of aircraft or a rare atmospheric phenomenon. Something that is unidentified is not necessarily an alien spacecraft.
So I have to say that I have not been convinced on real scientific evidence of any alien spacecraft or beings observed on Earth.

Does life exist in the universe? I think after some study that it could be possible and that's why scientists are still looking with telescopes and in particular our own solar system with possibilities of some form of life on Mars, The moon Enceladus, which orbits Saturn and Europa a moon that orbits Jupiter for example.

As to alien life that is sentient nobody really has an answer until we find it, or it finds us.

Live long and prosper!

We have more or less answered these questions perhaps without realizing .With what we understand and think of our own beginnings.

If the notion by science itself states that microbes fell to the earth and by natures processes cultivated them into the life that we see around us today including ourselves. It should be without doubt that this has happened everywhere else,a most 'common' an occurrence in the nature of the universe.

Live long and prosper