Problem:
I would like to learn about how the process of cloning works in nature - how are twins "created" after fertilization what genetic changes can occur in each of the twins.
Required:
Question: Where should I start?
Question: What are some interesting books on the topic, as well as recent research papers (or just the most important research topics that I could use to start looking for more information)?
Please explain the process of cloning works in nature.