Lots More Information

• How Cloning Works
• Why are some animals harder to clone than others?
• How Twins Work
• How DNA Works

• BBC News: Plan to create human-cow embryos - Nov. 7, 2006
• Human Fertilisation and Embryology Authority
• Institute of Human Genetics

• "British Scientists Hope To Create Human-Cow Embryos." All Headline News. Nov. 7, 2006.
  http://www.allheadlinenews.com/articles/7005436932
• "British Scientists Seek to Create Human, Cow Embryos." TechNewsWorld. Nov. 7, 2006.
  http://www.technewsworld.com/story/54123.html
• "Plan to create human-cow embryos." BBC News. Nov. 7, 2006.
  http://news.bbc.co.uk/2/hi/health/6121280.stm