This is the very same man who believes the Earth is 10,000 years old and creationism should be taught alongside evolution in the public school system.
He also has his own theory on the pyramids:
“My own personal theory is that Joseph built the pyramids to store grain,” Carson said in a 1998 commencement speech at Andrews University, unearthed by BuzzFeed. “Now all the archaeologists think that they were made for the pharaohs’ graves. But, you know, it would have to be something awfully big — when you stop and think about it, and I don’t think it’d just disappear over the course of time — to store that much grain.”
https://www.youtube.com/watch?v=FrqShRhxJBM