- Mycelium (plural mycelia) is a root-like structure of a fungus consisting of a mass of branching, thread-like hyphae. Fungal colonies composed of mycelium are found in and on soil and many other substrates. A typical single spore germinates into a monokaryotic mycelium, which cannot reproduce sexually; when two compatible monokaryotic mycelia join and form a dikaryotic mycelium, that mycelium may form fruiting bodies such as mushrooms. A mycelium may be minute, forming a colony that is too small to see, or may grow to span thousands of acres as in Armillaria.
- Twin Cities (allthetropes.org)
There are many twin cities - Buda and Pest, El Paso and Ciudad Juárez, Ottawa and Gatineau, and so on - but the one that most Americans think of when they hear the phrase “Twin Cities” is Minneapolis and St. Paul, the Twin Cities in Minnesota. Famous for the Mall of America (in one of the suburbs).