My interest in explanations was brought to a new higher intensified while I watched a movie. I must regress many more years to tell the entire story. Before I begin, though, I need to assure you that my story is absolutely true.

About 20 years ago, I awoke at about 3 a.m., and I saw the strangest thing. A small orb with a soft greenish glow hovered five feet over my bedroom floor, about an arm’s length out from the foot of the bed. The orb was about the size of a ping-pong ball. I walked toward the orb until my face was one foot from the orb. I tried to see if I could account for the glowing ball by checking for an external source of reflected light through the bedroom windows. I couldn’t find any such external light source, though. The orb itself was glowing and it was still in my bedroom. I considered touching the orb with my hand, but I didn’t. For a moment, I wondered whether it would try to communicate with me—a strange thought, given that I have never believed in disembodied sentience.

I noticed that the orb was slowly descending. It didn’t make any noise. After 30 seconds of descending, the orb reached the floor, then it took the shape of a sunny-side up egg as it melted into the bedroom floor. I went downstairs from my second floor bedroom to the first floor to see whether the orb was “melting” through the …