Is the Grand Canyon Evidence of Noah's Flood? Evolutionists say no and assert that it was formed gradually, over millions of years. But creationists say yes, asserting that the Grand Canyon defies evolutionary explanations and is evidence of the biblical account. This Saturday on Up For Debate, Julie Roys will explore this issue with theistic evolutionist Gregg Davidson who believes in a gradual, naturalistic explanation - and Andrew Snelling of Answers in Genesis, who holds to the flood theory. Listen and join the discussion this Saturday at 11 a.m. Central Time on Up For Debate! ​