Is There Evidence for Dark Matter?

Gideon: There is evidence, and more than one line of evidence, that suggests the existence of dark matter. He says secular scientists accept such all random conjectures that can't be tested. But there are good reasons within the models to believe this would have to exist in order for them to work. G Gideon asks each of you a question about how we date dinosor fossils. The answers will appear at the end of next week's show.