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National UFO Reporting Center
Sighting Report
Occurred : 8/19/2016 06:30 (Entered as : 08/19/2016 6:30)
Reported: 8/19/2016 3:54:45 PM 15:54
Posted: 8/25/2016
Location: Knoxville, TN
Circle in yard

On October 19, 2016, about 6:30 am, I was taking out the trash to be picked up, and in my back yard was a circle about 14 feet in diameter.

Almost half the circle was under a tree. The ground wasn't burned but there was a substance there that I had never seen and couldn't determine what it was. It is a dark brownish and powdery substance.

I touched it and I was able to wash it off my hand easily and it had no smell. I didn't think about taking a sample until it started to rain and I thought it would be gone but when I went back to it, the rain hadn't washed it away. I took a sample with a paper towel and picked some of the grass.

It clings to the grass in a peculiar way, like nothing that I have seen. A couple of years ago, a friend that lives about 15 miles away had something similar in her yard but in the circle there were imprints in the ground like something had sat on the ground. The grass in that area died.