Two different ages are usually given for the Grand Canyon.

Millions of years is what geologists have found, and 4,300 years, which is the date of Noah's flood, according to biblical literalists.

In support of their religious claim, young earthers have gone to great lengths in the Grand Canyon, looking for ways their implausible young age can be supported.

Well, has the science-based age been able to withstand the assault?

We're going to find out today on Skeptoid.

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You're listening to Skeptoid. I'm Brian Dunning from Skeptoid.com, measuring the age of the Grand Canyon.

Questions abound in our natural world, keeping it ever more engaging for those who study it.

One such question is the age of Arizona's Grand Canyon.

Two billion years of history are laid bare by the strata it exposes, but what we don't have a complete answer for is when it was laid bare.

In science, conclusions are in the millions of years ago, but in other disciplines claims are far smaller.

Today, we're going to look at one such claim and what it means for the state of science in our culture.

We can start with the latest science on the age of the canyon, while it's relatively easy to date the rock the canyon is carved from.

It's not so straightforward to determine when the canyon itself was carved out of that rock.

The two numbers you'll hear most often are 6 million and 70 million years.

...