The word clone was not really used until 1963 in a speech. They had many theories on this. In 1952 the tadpole of a northern leopard frog was the one of the first experiments and the first animal of a long line of other animals to be cloned.
Some people who were pretty important that were involved in cloning were mostly scientist. Such as J. B. S. Haldane and August Weiseman.
The first experiments with cloning had to do with a tadpole. About 2 decades later they did it on mice. These animals were one of the first animals to be cloned and they weren't the only animals that got cloned many more animals were cloned as well.
There were types of technology used for cloning. Advanced Cell technology (ACT) was one of many. Since it's cloning there would of course have to be a lot of technology.
There are benefits from cloning. One benefit is that cloning helps scientist observe the animals or object being cloned as well as look for diseases. But there are also some risks that are made. A big risk there is, is that the thing being cloned can die.
There has to be some regulations of course and some regulations were made by scientist named J.B.S. Haldane and August Weisman. A regulation they made was that cloning is allowed in only some countries in the world. This regulation was made since the fact that genetic differences are able to exist between a clone and its doner. This led to many countries banning reproductive cloning on people. So basically reproductive cloning is now banned from many countries.