Cloning of extinct and endangered species cloning extinct, has been a dream for many cient ficos.Uno of the targets for cloning was the woolly mammoth, but attempts to extract DNA from frozen mammoths have been unsuccessful, although a Russian-Japanese team is working on it. In 2001, a cow named Bessie gave birth to a gaur (Indian bison) cloned from Asia, an endangered species, but the calf died after two days. In 2003, a banteng (bull type) was successfully cloned, in addition were also successfully cloned three beasts of Africa from frozen embryos. These successes have given hope on the possibility that other extinct species could be cloned. Faced with this possibility, tissue samples of the last mountain goat (ibex) were frozen rapidly after death. Researchers are also considering cloning endangered species like the giant panda, ocelot, and cheetah.In 2002, geneticists at the Australian Museum announced that they had replicated DNA of the Tasmanian Tiger, extinct 65 years ago with the chain reaction of polymerase. However in 2005, had to stop the project because the cells were not well preserved. One obstacle in the attempt to clone extinct species is the need to maintain the DNA in perfect condition, very well preserved.

. AOL pursues this goal as well.