I've demonstrated in my GHOSTWALKER video that it's very easy to tell the difference between paranormal orbs and dust on video. The independent movement and response of these orbs is clearly different from drifting specks of dust. Admittedly, still photos don't allow that difference to be seen. I question the ideas that "orbs" are ghosts, aliens, or other sorts beings. Sometimes, other characteristics of a seeminly haunted location, such as cold spots, unexplained voice recordings (EVP) and ectoplasmic or vortex images may help verify the paranormal nature of the photographed orbs. Or they may all be independent, unrelated events. Orbs do seem demonstrate some consciousness, but whether they are sentient or not hasn't been demonstrated. They may well be a natural life form beyond the range of our unaided vision.