Bacterial bloom as the Earth thawed: Photosynthetic organisms during the Snowball Earth

Around 650 million years ago, the Earth entered into the Marinoan glaciation that saw the entire planet freeze. The 'Snowball Earth' impeded the evolution of life. But as it warmed, biotic life began to flourish. A research team has now analyzed rock samples from China to tell us more about this transition.

source https://www.sciencedaily.com/releases/2021/08/210827121450.htm