if there were more advanced aliens out there,I doubt they would care to make contact with us since we behave like total animals and primitives with all those wars and fighting and crime, polution etc...,they wouldnt trust us enough to share their advanced technology for fear we might use it to kill each other. so until all people on earth respect everyone else,untill we clean up all the mess and live more responsibly,the aliens will just cruise around in their UFOs and roll their eyes,wondering how long it will take before we smarten up. yeah Im about 99.9% sure they are out there cause there was just way too many sightings of unknown flying things NOT of earthly designs. also even if some of them landed trying to contact us like happened in Roswell and Kecksburg ufo cases the big G (goverment)just puts a big lid on everything saying its a weather baloon or such,for fear that people would go into shock I guess...like they did when Orson Wells radio play War of the worlds about Martians landing way back then did. people just aint ready for aliens yet ,is my opinion.