31.   Researchers trying to clone animals have reported that many of their attempts have ended in disaster, with monster-like creations and repeated premature deaths.

32.   Researchers trying to clone animals have reported that many of their attempts have ended in premature deaths and birth defects.

33.   That was the first use of cells from an adult mammal to clone another animal.

34.   The breakthrough of cloning an adult means scientists could clone proven animals.

35.   They said the death was not believed related to the fact that the animal was cloned, but that the autopsy is still being analyzed.

36.   Until now, no one has tried to clone the animals for commercial use by farmers and breeders.

37.   Until now, no one is known to have cloned the animals for sale themselves.

38.   Among cloned animals, only one in six of the embryos survive to birth and many die within a few weeks because of malformation.

39.   This was because scientists had for years tried to clone animals in their bid to reproduce quality stocks, protect endangered species or maintain specific breeds.

40.   Japan is considering a partial ban on developing technologies to clone animals for ethical reasons, the top government spokesman said Monday.