The History of Life

The video explores Earth's history, estimated to be 4.6 billion years old, through fossils and rock layers. It explains dating methods, including relative and absolute dating, and introduces the geologic time scale, dividing Earth's history into supereons, eons, eras, periods, and epochs. Key eras discussed include the Precambrian, Paleozoic, Mesozoic, and Cenozoic, highlighting significant evolutionary milestones such as the emergence of life, the age of dinosaurs, and the rise of mammals.

What methods do scientists use to determine the age of fossils and rock layers?

Explain the difference between relative dating and absolute dating.

What are the major units of the geologic time scale?

Describe the conditions on Earth during the first billion years of its existence.

What significant events occurred during the Mesozoic era?