How can nobody in the world know what it does? Do you know what everybody in the world knows? And why would it be a guestimate if they didnt guess or estimate anything? Its the Duke University, im pretty sure they know what they are doing. Its not like someone who goes to college says "hey, maybe this thing does this" and goes out and publishes it, there IS research and expirementation involved in studies you know. And you dont need to watch something to know what it does, we know our brain thinks but we cant just open someones head and watch them think. Oh and BTW it is connected to the intestines, the cecum is a part of the large intestine.