24. History of Life on Earth
History of Life on Earth
1:42 minutes
Problem 3b
Textbook Question
Textbook QuestionYou set your time machine for 3 billion years ago and push the start button. When the dust clears, you look out the window. Which of the following describes what you would probably see? a. a cloud of gas and dust in space b. green scum in the water c. land and water sterile and devoid of life d. an endless expanse of red-hot molten rock
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