10 Oldest Animals On Earth You Probably Didn’t Know Exist

1. Cyanobacteria

Age: 2.8 billion years

Cyanobacteria - oldest animals

Number one on our list of oldest animals is Cyanobacteria. Usually referred to as “blue-green algae,” it is said to have been responsible for dramatically changing the composition of Earth’s life forms. As a byproduct of photosynthesis, cyanobacteria both produce and release oxygen.

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