Question: When did the first mammal appear on earth?
qaPairs: question: Which geological periods did the first mammal appear on earth?
answer: Paleogene and Neogene periods of the Cenozoic era
question: Which geological epoch did the first mammal appear on earth?
answer: Late Triassic Epoch
question: When did the first mammal appear on earth (years ago)?
answer: 225 million years ago
225 mya
question: Which geological era did the first mammal appear on earth?
answer: Cenozoic era
qaPairs: question: During which geological periods of the Cenozoic era did the first mammal appear on earth?
answer: Paleogene and Neogene periods
question: During which geological epoch did the first mammal appear on earth according to Kemp?
answer: Late Triassic Epoch
question: How long ago did the first mammal appear on earth according to Kemp?
answer: 225 million years ago
question: During which geological era did the first mammal appear on earth?
answer: Cenozoic era