Two things made me a believer. 1) when someone said there are as many galaxies as there are grains of sand on a beach, so we would be arrogant to think we are the only forms of life out there.
number 2) was this:
Ancient Aliens | Ancient Air Planes
Pleant or cave drawings on the walls and in ancient times showing space craft and planes WAY BEFORE roswell and the excuse of copy cat sightings since roswell......Even more controversial than the model airplane are
the enigmatic carvings found in the temple of Abydos,
Egypt by Dr. Ruth Hover. Hover photographed a wall
panel which had been revealed when a newer
overlaying panel crumbled and fell off. The older
panel beneath contained embossed images that
resemble modern aircraft as seen in profile.
But since airplanes had not yet been invented in 1898 (never mind ancient Egypt), it was labeled as a model of bird and
stored away in the basement of the Cairo museum. The object was rediscovered many years later by Dr. Khalil Messiha,
an authority on ancient models. According to Messiha and others who have studied the object, it has characteristics of
very advanced aerodynamics, much like modern pusher-gliders that require very little power to stay aloft. The curved
wings are today known as reverse dihedral wings, which can attain great amounts of lift. A similar design is employed on
the supersonic Concord aircraft.