It should be easy to perceive that both my equipment and skills have evolved over time.
I also use photos that are in the public domain, either from the National Oceanic and Atmospheric and other government agencies, and from Wikimedia Commons, where generous photographers from around the world have shared their images for free, public use. Wikimedia Commons images are used under the Creative Commons licenses granted with each Wikimedia Commons image.
I always seek to give credit to the photographer, whenever possible. I occasionally, with their permission, use photos from other photographers, giving credit to them.