Top 10 Alien UFO NASA Mars & Earth Video Alien UFO 2015-2017 Experts Confirmed Real. It does not mean they all are interstellar spaceships full of little grey aliens, reptilians and green people but multiple experts reviewed those videos and confirmed they are real unidentified flying or shape shifting objects. Top secret leaked NASA footages from Mars and earth upper atmosphere as well as several shape shifting fast flying UFOs are especially curious since it's not possible to fly a drone disguised as UFO in these conditions.