According to UFO researcher Scott Waring, this UFO disguised as a cloud hovered over a mountain in Boulder, Colorado.
This time lapse was reported by a Twitter user who works at the David Skaggs Research Center in Boulder.
The cloud maintained its position on the mountain while other clouds passed and changed its shape from one disk to two.
Colorado is famous for its UFO sightings, but most of the time the shape of UFOs are white spheres that move incredibly fast.
Here’s a time-lapse of the lenticular cloud we captured looking west out of the David Skaggs Research Center this morning! #COwx pic.twitter.com/7IyhDGSWH1
— NWS Boulder (@NWSBoulder) December 6, 2019
Source: Extranotix