Unlike Miller and Urey, who believed the early Earth had a reducing atmosphere, scientists today believe the early Earth had a neutral atmosphere composed primarily of carbon dioxide. Credit: NASA
From Live Science:
The Miller-Urey experiment, conducted by chemists Stanley Miller and Harold Urey in 1953, is the classic experiment on the origin of life. It established that the early Earth atmosphere, as they pictured it, was capable of producing amino acids, the building blocks of life, from inorganic substances.
Now, more than 55 years later, two scientists are proposing a hypothesis that could add a new dimension to the debate on how life on Earth developed.
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