The word "fs" appears to be a typo or abbreviation rather than a standard English word. If you meant "foss," as in "fossil," or perhaps "fs" as an abbreviation for "file system" or "for sure," please confirm for further clarification. For now, I will proceed with "foss," which is commonly discussed in contexts involving fossils.
The term "fossil" comes from the Latin word "fossilis," which means "dug up." It relates to the ancient practice of unearthing materials from the Earth, specifically to refer to remains of organisms preserved in geological formations.
If "fs" refers to something else, please specify!