Chemical analysis of some of the world’s oldest rocks, by an international team led by ±«ÓãÖ±²¥ researchers, has provided the earliest record yet of Earth's atmosphere. The results show that the air 4 billion years ago was very similar to that more than a billion years later, when the atmosphere -- though it likely would have been lethal to oxygen-dependent humans -- supported a thriving microbial biosphere that ultimately gave rise to the diversity of life on Earth today.
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Published on: 14 Jan 2015
