Grizzly bear on a trail by Jim Peaco. Original public domain image from Flickr https://www.rawpixel.com/image/4038043/photo-image-animal-public-domainFree Image from public domain licenseFreight car home. Box Butte County, Nebraska. Sourced from the Library of Congress. https://www.rawpixel.com/image/12267268/photo-image-cloud-plant-skyFree Image from public domain license