Early cyanobacteria fossils dug up in 1965
Excerpt from the October 30, 1965, issue of Science News Letter
![cyanobacteria](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2015/10/093015_lg_cyanobacteria_free.jpg?fit=860%2C460&ssl=1)
BLUEISH GREENISH Cyanobacteria were the world’s first oxygen-producing photosynthetic organisms. The fossil record is spotty for these organisms, which are also called blue-green algae.
CSIRO/Wikimedia Commons (CC BY 3.0)