Reasons to Believe

History of Ancient Supercontinent's Breakup Detailed; Blobs Inside Earth Like Peanut Butter

Source: Yahoo! News, "History of Ancient Supercontinent's Breakup Detailed," by Monica Heger, LiveScience Staff, May 4, 2008. 
Yahoo! News, "Blobs Inside Earth Like Peanut Butter," by Robert Roy Britt, LiveScience Managing Editor, May 2, 2008