
The study of fossils, the discovery of ancient artifacts, and the use of radiocarbon dating have helped us learn a lot about prehistoric times. How did the dinosaurs live? What did Earth look like long ago? What were the first human beings like? Scientists are now fairly confident...

The study of fossils, the discovery of ancient artifacts, and the use of radiocarbon dating have helped us learn a lot about prehistoric times. How did the dinosaurs live? What did Earth look like long ago? What were the first human beings like? Scientists are now fairly confident...