Robert Lanza (1956- )
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During the twentieth and twenty-first centuries, Robert Paul Lanza studied embryonic stem cells, tissues, and endangered species as chief scientific officer of Advanced Cell Technology, Incorporated in Worcester, Massachusetts. Lanza's team cloned the endangered species of gaur Bos gaurus. Although the gaur did not survive long, Lanza successfully cloned another cow-like creature, called the banteng (Bos javanicus). Lanza also worked on cloning human embryos to harvest stem cells, which could be used to treat dieases. While previous techniques required the embryo's destruction, Lanza developed a harvesting technique that does not destroy the embryo, forestalling many ethical objections to human embryonic research.