I'm going out on a limb to say this video was a fail. The fact that there are two different types of rocks doesn't mean much to the average person. How can Tom say it's "obvious" when the geological forces needed to create these two different type of rock need to be known, otherwise it's nothing obvious about it at all. And I assume "thought to be much older" is really specifically reflecting the belief that the Earth was 5000 years old from scripture. This is vastly different from believing the earth was a few million years old from primitive scientific study, and changing that belief to 100s of millions. "Low-hanging fruit?" Really? Tom needs to spend more time in the American Bible Belt to see just how deeply ignorant 21st century people can be.