Do aleins exsist

Answer 1

No one can confirm the existence or non-existence at this time. People believe there could be existing live on other planets but we don't really know. Astronomers and Astronauts haven't found any conclusive evidence. The assumption on extraterrestrial life form existence is based on chance. Scientist try different method of communication like deep-space satellite sent out of the solar system and radio communication sent to the solar system we expected to have life. We did monitor for patterned radio signal from space. Despite the effort, the discovery is however can be very difficult due to many reason.

• We can't travel beyond the speed of light and the nearest possible solar system with probability to have life evolved is 20 light year away. It is not known if we could break the speed of light limit or not. It is still the work of Theoretical Physics.
• If the extraterrestrial life exist but they didn't reach the civilization state, there is no way they would interpret or even recognized our radio wave sent to them. Or what if their civilization would based on another communication technology that didn't required use of Radio wave.
• The civilization time-scale is pretty short for life of the stars. The Earth we live in can only support life for next 500 million years and life exist on earth is just 500 million years ago. Total span of existence of life is just merely 7% of Sun's life. Existence of intelligent life form like us human is just 0.1 million year ago. Other life form in another solar system might cease to exist or will come to exist at different time span from us human being.

The closest thing in human reach is the possible evidence of life existence on Mars. It is still far from conclusion if the intelligent alien would exist.