Crop Circles.

It is true that some have been man made - some even deliberately under close study to see how ones made this way compare with the 'found ones' - and clear differences exist between both types.

Now whatever you may want to personally believe, I can never look at them quite the same way again, since having seen one particular image.

Most of them have very sharp 'pixel on/off' type images, but I saw one (not man made) that has a very complicated circular maze type sharp image on the right, and a vague blurry image on the left. Then you rotate it 90 degrees, and this blurry blob turns into an amazingly striking image, just like how those photos of snow covered mountains turn into faces (it's just the way our brains work processing visual input!)...

Do I know all the answers?

Nope - but I get a bit twitchy whee

1) loud mouthed w*nkers decry it all as rubbish
2) loud mouthed w*nkers tell me the ONLY possible answer is XXX

I just dunno - yet! And the same with Kennedy's assassination, 9/11. etc, etc, etc. Both categories above obviously have an agenda, and they both NEED to convince ALL non-believers...