Life on Earth: Prokaryortes, eukaryotes, and evolution

1) Remember: Setting the stage: The Earth 2.5 billion years ago

2) Remember: The first eukaryotes

3) Remember: The Cambrian explosion

4) Evolution

5) Mass extinctions

6) Chicxulub

7) Summary

Detection of life

8) What are we searching for?

9) Where are we searching?

10) The Viking missions to Mars

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