http://en.wikipedia.org/wiki/List_of_UFO_sightings

this is a website that has all the ufo sighting that we know of( or most of them ) the first one was on 1886. when jose bolnli was staring at sun spot when he saw 236 moving objects in the sky.
i think ufo are really there are vidios and more and with 100 's of galaxys there has to be more people than just one plantet full of them.