The earth has undergone many climate and ecological changes during the course of life's history. This colorful cast of characters has outlasted their contemporaries and still survive today.
"What's Old Is New: 12 Living Fossils," by Brandon Keim
Here is one of the more interesting specimens:
Here are a couple project ideas on this topic:
1. Research and create a timeline of the planet's major extinction events.
2. Research one of these creatures in detail. Discuss any special features of the creature that has helped it survive through the ages.