What did carl linnaeus invent?

Carl Linnaeus didn't invent anything in the modern sense of the word. He was a naturalist and taxonomist, best known for developing the binomial nomenclature system for classifying organisms. This system is still used today and is considered one of the most important contributions to the field of biology.

Here's a breakdown:

* Binomial Nomenclature: This system uses two Latinized words to give each species a unique scientific name. The first word is the genus, and the second word is the specific epithet. For example, the scientific name for humans is *Homo sapiens*.

* Hierarchical Classification: Linnaeus also developed a hierarchical system for classifying organisms, grouping them into increasingly broader categories: kingdom, phylum, class, order, family, genus, and species.

While Linnaeus didn't invent a physical object, his system of classification was a groundbreaking invention that laid the foundation for modern taxonomy and our understanding of the natural world.