Origin of photosynthesis may go further back than estimates from 50 years ago
Excerpt from the March 18, 1967, issue of Science News
SOLAR POWERED Ancient cyanobacteria, much like these modern-day ones, expelled oxygen into Earth’s atmosphere as a byproduct of photosynthesis, perhaps as early as 3.2 billion years ago.
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Evidence of Precambrian life
From deep in the gold mines of South Africa’s Orange Free State has come evidence that there was some form of biologic activity on Earth at least 2.15