There was a nice article in The Economist a few months back describing the issues with coming up with a good definition of "species": https://www.economist.com/

There was a nice article in The Economist a few months back describing the issues with coming up with a good definition of "species": https://www.economist.com/schools-brief/on-the-origin-of-species/21803917 https://www.economist.com/schools-brief/on-the-origin-of-spe...