How was the earth formed and how has it become what we know today?

Earth formed around 4.54 billion years ago, approximately one-third the age of the universe, by accretion from the solar nebula.

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colorectal cancer may also develop from areas of abnormal cells in the lining of the colon or rectum. this area of abnormal cells is called dysplasia and is more commonly seen in people with certain inflammatory diseases of the bowel such as crohn's disease or ulcerative colitis.