The Jurassic Period: The History and Legacy of the Geologic Era Most Associated with Dinosaurs

The early history of our planet covers such vast stretches of time that years, centuries and even millennia become virtually meaningless. Instead paleontologists and scientists who study geochronology divide time into periods and eras. The current view of science is that planet Earth is around 4.6 billion years old. The first four billion years of its development are known as the Precambrian period. For the first billion years or so, there was no life in Earth. Then the first single-celled ...