Bill Nye is touring the new Noah's Ark attraction in Kentucky that he has called a danger to the nation's science education.
Answers in Genesis president Ken Ham extended an invitation to Nye, best known for his 1990s science TV show, to take a private tour of the Ark Encounter Friday.
The two became acquainted when they engaged in a 2014 debate on creationism streamed online.
The science educator also delivered the 2014 Presidential Lecture at Murray State University, shortly before the debate with Ham.
Answers in Genesis says Nye is touring the ark with his own film crew.
The Christian group says the ark is part of its ministry that teaches Old Testament stories as true historical events.
After the 2014 debate, Nye said he hoped the ark would never be built, because it would "indoctrinate children into this extraordinary and outlandish, unscientific point of view."
The ark opened to the public Thursday.