1. About 200 million years ago, 2. Cenozoic era, 3. The period between the extinction of the dinosaurs and the present day is called the Age of Mammals or Cenozoic. Mammals appeared on the earth long before the extinction of the dinosaurs
<span>It would be "correlating" rocks of similar age in different regions.</span>
Most people can’t agree on others Decisions or beliefs so because of that voting and many other things were controversial
Stephen A. Douglas (1813-1861) was a U.S. politician, leader of the Democratic Party
