A slot canyon, formed by rushing water through porous rock. In this case, red sandstone. Original image from Carol M.…
https://www.rawpixel.com/image/421963/free-photo-image-arizona-canyons-black-and-white-landscape-photography-grayscaleFree Image from public domain license
Light streams in to an Arizona "slot canyon" near Page. Original image from Carol M. Highsmith’s America, Library of…
Light beams into an Arizona "slot canyon" near Page. Original image from Carol M. Highsmith’s America, Library of…
https://www.rawpixel.com/image/421973/free-photo-image-black-and-white-landscape-photography-background-carol-highsmithFree Image from public domain license
Test Tubes from experimenting on coronavirus. Original image sourced from US Government department: Public Health Image…