Most things in life can be explained, but here are 20 photos that still stump the greatest minds, even to this day. Here are 20 Mysterious Photos That Cannot be Explained.

20. Heavenly Signs

Probably one of the most famous unexplained images of all time and number 20 in our list. The painting is of Mary-mother of god, but if you look closely, you may spot the strange UFO-looking object hovering above her left shoulder. Just below it you can see a man with his dog staring up at the flying saucer. Is this the first ever sighting of a UFO captured on canvas?