Fossil Evidence of Change Land Environments The History of Life Section 1 Earth formed about 4.6 billion years ago. Gravity pulled the densest elements.
Click on a lesson name to select. The History of Life Section 1: Fossil Evidence of Change Section 2: The Origin of Life.
The History of Life 14.1 Fossil Evidence of Change Land Environments The History of Life Chapter 14 Earth formed about 4.6 billion years ago. Gravity.
