EPISODE · Jan 19, 2024 · 5 MIN
RARR Teaser 44
from Raw Audio Radio Rodeo · host RARR
The biochemical capacity to use water as the source for electrons in photosynthesis evolved once, in a common ancestor of extant cyanobacteria (formerly called blue-green algae). The geological record indicates that this transforming event took place early in Earth's history, at least 2450–2320 million years ago (Ma), and, it is speculated, much earlier.
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