There are many theories about who built the pyramids in Egypt and the true nature of their purpose. Republican presidential candidate Ben Carson has one of his own.

There are many theories about who built the pyramids in Egypt and the true nature of their purpose.
Republican presidential candidate Ben Carson has one of his own. 
Carson gave his take on the monumental structures during a 1998 commencement speech at Andrews University.
Video of the speech was published on BuzzFeed Wednesday and is now circulating. 
In the footage, Carson