Stanley Miller's 1953 experiments assumed that early Earth's atmosphere contained

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Stanley Miller's 1953 experiments assumed that early Earth's atmosphere contained ammonia, methane, hydrogen gas, and water vapour. This is known as the "primordial soup" theory, which states that the early Earth's atmosphere was rich in these gases, and that lightning and UV radiation provided the energy needed to react them and form organic molecules like amino acids, the building blocks of life.

Stanley Miller's 1953 Experiments Assumed That Early Earth's Atmosphere Contained