Money supply. In economics, the money supply (or money stock) is the total amount of monetary assets available in an economy at a specific time. There are several ways to define money, but standard measures usually include currency in circulation and demand deposits (depositors' easily accessed assets on the books of financial institutions).
Smallpox (Variola). Smallpox last appeared in Australia in 1938, and the last case naturally occurring cases in the world was reported from Somalia in 1977. The virus is now only held officially in two secure laboratories.
Biological controlâitâs not evolution. The cane toad was introduced to Australia in the hope that it would control two species of beetle (Frenchâs cane beetle and the greyback cane beetle) which were decimating sugar cane crops.(The beetlesâ larvae were eating the roots and stunting, if not killing, the plants.) As it turned out, the plan was unsuccessful.he cane toadâs rapid spread is not a unique phenomenon. Rabbits were unknown in Australia before European settlers brought them, yet soon colonized a massive area, extending from their release sites in south-east Australia all the way to the coast of Western Australia.