I believe that "life exists outside of Earth" and I've written several posts on the matter so I will just add these links... hope this qualifies as one big answer.
https://steemit.com/science/@mithrilweed/are-we-alone-in-the-universe
https://steemit.com/science/@mithrilweed/what-would-happen-if-we-find-life-on-another-planet
https://steemit.com/science/@mithrilweed/finding-a-second-earth-is-not-a-matter-of-if-but-when
https://steemit.com/life/@mithrilweed/is-humanity-prepared-for-the-discovery-of-alien-life
https://steemit.com/science/@mithrilweed/declassified-ufo-footage
I would also state that we more than likely have been visited in the past and the knowledge has been supressed. Why are we never taught in schools anything about ancient Sumeria, where the first language, writting and records of these events are detailed?
Wow lot of articles on the topic! Thanks for sharing!