How Life Began (History): Was life triggered by some event, like lightning hitting a pond full of amino acids? Earth was teeming with life billions of years before the dinosaurs existed. Single-celled organisms inundated the oceans, and the soil swarmed with living... (more details for How Life Began (History))

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File by Crystal DeMoura (#2896)
2015-12-05 Grade: 6-8