Calculating the date of a Viking visit in regards to carbon 14 dating is demonstrated.

A Viking campfire was found to have a percentage of 88.6 percent of C14 in 1965. The amount of C14 decreases exponentially with a half-life of 5550 years. What then, was the approximate date of the Viking visit?

Uniformitarian principles are discussed.

Why is uniformitarianism and how does it work?