History of Earth's Complex Life Forms

Topic Page

Questions

• What are trilobites?
• Why is the fossil history of the horse so important for explaining the evolution of complex lifeforms in recent history?
• What are the major mass extinctions in earth's history?
• How do geoscientists trace the evolution of complex life forms through the earth's history?
• Were humans present when Pangaea was in existence?
• Question #2d105
• Question #2d13d
• In which era did dinosaurs exist or begin to exist? Mammals?
• Question #4cdd1