“What are these?”

“Distinctive pattern in gravel, sand, or other particulate matter,” Davis said. “One of our key clues, professor. Official term for them is ‘Lyikes structure’ after Dan Lyikes at UCLA who was the first to describe them. The boys call them ‘lykies’ or ‘scribbles.'”

“I…see,” Thomas said, tracing the pattern in the air. “That’s very descriptive while simultaneously very vague. How are they made?”

“If we knew that, we’d be a lot closer than we are to figuring this whole mess out,” said Davis. “All we know is that they appear from one to forty-eight hours after a sighting. We’ve put cameras up, but no one has ever seen one being made.”