Rocks and Clocks

Have you every wondered how we know the age of Earth or how long it has been since the dinosaurs ruled the planet? It turns out that the answer is within the rocks themselves. In this video, TBD discusses the concepts of modern geology and how rocks can actually be used as clocks! TBD describes the different types of rock, which ones contain the fossil archaeologists and biologist are interested in, and which ones tell us how old those fossils (and the planet!) really are.