Then we had the mysterious Windows 10 wallpaper, which looked like computer-generated imagery ... with Microsoft opting not ...

Bing & EarthSciences on your desktop. It automatically brings you a new wallpaper daily as per your choice and selection. National Geographic Photo of the Day Wallpaper Changer and NatGeo ...

The photo you see above -- the default wallpaper for Windows XP -- is probably the most recognizable image in the world. What you probably didn't know is that it's a real photo, called Bliss ...