Question: When did the earliest organisms appear on earth?
qaPairs: question: When is the earliest time that the earliest organisms possibly appear on earth?
answer: 4.54 billion years ago
4.5 billion years
question: When is the latest time that the earliest organisms possibly appear on earth?
answer: 3.77 billion years ago
question: When did the earliest organisms appear on earth that we have direct evidence for?
answer: 3.465-billion-year
3.465-billion-year-old