Dark Watchers have been spooking California hikers for centuries. What are they?(livescience.com)
livescience.com
Dark Watchers have been spooking California hikers for centuries. What are they?
https://www.livescience.com/dark-watchers-california-optical-illusion.html
1 comments
I believe this is the correct answer: https://twitter.com/DamascenoPF/status/1371861649011843073