WHAT ARE THEY? Several people captured a mysterious formation of green lights hovering above the Brushy Creek area in Williamson County, prompting some to wonder if they witnessed something otherworldly. Emily White said she and her friend froze when they saw a grouping of lights forming a circle overhead when they went for a walk at about 10 p.m. Thursday. She pulled out her cell phone to record the grouping that they saw in the night sky. “We stopped for a few minutes, and we were kind of mesmerized by it. It was almost like a ray of yellow-green lights,”...