Update at 9:15 p.m. ET: Nye's Counter-Rebuttal
"Thank you, Mr. Ham. But I am completely unsatisfied. You did not, in my view, address this fundamental question: 680,000 years of snow-ice layers, which require winter-summer cycle."
There simply hasn't been enough time to generate the species on Earth, Nye says.
"Then, as far as Noah being an extraordinary shipwright, I'm extraordinarily skeptical," Nye says. He cites his own family's background in New England, where people spent their lives learning how to build ships.
"It's very reasonable, perhaps, to you that Noah had super-powers and was able to build this extraordinary craft with seven family members," Nye says. "But to me, this is just not reasonable."
When scientists make assumptions, Nye says, "they're making assumptions based on previous experience. They're not coming out of whole cloth. So, next time you have a chance to speak, I encourage you to explain to us why we should accept your word for it that natural law changed just 4,000 years ago – completely – and there's no record of it.
"You know, there are pyramids that are older than that. There are human populations that are far older than that – with traditions that go back farther than that. And it's just not reasonable to me that everything changed 4,000 years ago."
Nye also asks Ham to discuss the billions of people on Earth, including Christians, who don't agree with Ham's point of view about the planet's age.
"So, what is to become of them, in your view?" Nye asks.