Being able to download wallpaper theme packs is a fun ... Last I checked, Microsoft is not operating a deep-space telescope, and such images in 4K are rarely free. Of course, if you want free ...

Mounted onboard MBARI's remotely operated vehicles (ROVs), MBARI has captured new 4K ultra-high-definition (UHD) resolution footage of deep-sea life thousands of meters below the ocean's surface.