When did the first life appear on earth
- when did the first plant life appear on earth
- when did the first complex life appear on earth
- when did the first life forms appear on earth and what were they
- when did the first human life appear on earth
- when did the first multicellular life appear on earth
- when did the first life appear on earth era
- when did the first life appear on earth what was it like
- when did the first life appear on earth
