Many animals were brought to Australia by humans.. The earliest known introduced species is the Dingo, brought here by the Aborigines possibly as early as 40,000 years ago.More recently European settlers introduced large numbers of animals and plants both intentionally (cattle) and unintentionally (mice).any animals were brought to Australia by humans. Some, such as the sheep and cattle, have been vital to the Australian economy. Others have caused serious problems to the Australian environment, native animals and plants. Believe it or not the most destructive animal ever introduced into Australia are humans.
â Surprisingly, some of these Greek ideas led to similar modern ideas. Democritus (462-370 B.C.): proposed that all matter was made up of tiny, indivisible. particles called atomos (meaning âindivisibleâ) or atoms. Empedocles (490-430 B.C.): suggested all matter was composed of four basic elements: air, water, fire, and earth.
J.j. Thomson Atomic Theory. Thomson discovered the electron in the year 1897. His work put forward a new theory, that atom was made up of small particles.Thus he discovered the electrons. He proved his theory using the cathode ray tube. Scientists had already done many experiments to find the structure of the atom.