Aliens - Fact Or Fiction..?

Well we've had a time travel thread so I thought we should have an aliens thread too.

I believe that aliens have visited and are visiting our planet. Now I don't think that there are aliens that are living here and impersonating humans, but I certainly believe that at least SOME of these UFOs captured on film and seen by people are alien spacecraft.

How am I reasoning this? Pretty simple. There have simply been too many technological leaps since the 50s to make it not being true. Just have a think about it:

1. Integrated circuits and microchips.
2. Credit cards and bank cards.
3. Cassette tapes, CDs, DVDs, Blu-Rays.
4. Kevlar
5. Lasers
6. Stealth bombers
7. The Oculus Rift lol
8. Velcro.
9. Quantum Computers.

And then have a look back through time and you have the Pyramids, Mayan astronomy and cities, Stonehenge, the Inca's Machu Picchu and Teotihuacán in Mexico.

A great deal of these UFO sightings are around air bases so a good percentage of them can be put down to experimental aircraft, but ALL of them?

The truth is out there. Trust no one.