On January 14, 2000 (December 8, 1999, the lunar calendar), humans successfully cloned monkeys. On January 14, 2000, the BBC reported that a cloned macaque monkey was recently born in the United States. This is the first time in the world that a primate-the animal that is genetically closest to humans-has been successfully cloned. The research team from the Oregon Regional Primate Research Center recently published their cloning results in the prestigious journal Science. The cloned monkey is called Tetra, and its cloning method is completely different from the birth of the first cloned sheep, Dolly. Cloned monkeys used the method of dividing embryos. The researchers repeated the experiment 13 times and divided 107 monkey embryos into 368 embryos through various methods. As a result, 4 of them developed mature but died in the womb. Only Tetra was lucky to be born 157 days after the embryo split. Four more pregnant female monkeys are expected to give birth to their own cloned babies in May this year. Dr. Gerard Skarten of the research center said the cloned monkeys will be used for human diabetes and Parkinson's disease research. "Since their genes are exactly the same, their response to the drug will be the same, which will greatly simplify the experimental process. "Cloning primates has once again raised concerns and speculation about human cloning. It is reported that a private cell biotechnology company in the United States successfully cloned the world's first human embryo using human leg cells and cow eggs in June last year, and it survived for 12 days.