Why are some animals harder to clone than others?
Reproductive cloning, in which you create an exact genetic duplicate of an organism, isn’t like photocopying pages in a book. The cloning process doesn’t simply spit out replicas ad nauseum. Nevertheless, that concept seems to pervade the public’s perception of the technology, fueling fears of clone armies and herds of cloned super-animals in the future. Currently, there have been 15 documented species successfully cloned: cat, dog, horse, mule, sheep, guar, bull, mouse, goat, pig, horse, cow, deer, banteng and rabbit. Each time scientists successfully clone a new animal species, people often recoil, viewing it as another step closer to human cloning. But worries about generating cloned people like snacks out of a vending machine are largely unfounded since, for one thing, many countries ban or strictly regulate research on human reproductive cloning. In fact, th
