Overview
- Scientists have expanded the evolutionary chart of life on Earth to include the Proterozoic Eon, dating back nearly 2 billion years.
- The study highlights the 'Boring Billion,' a period from 1.8 to 0.72 billion years ago when eukaryotic evolution was slow and species turnover rates were low.
- Eukaryotic cells, which form the basis of multicellular life, underwent critical internal transformations during this time, setting the stage for future complexity.
- Global ice ages between 720 and 635 million years ago triggered a surge in evolutionary activity and biodiversity after the planet thawed.
- The findings raise key questions about the environmental and biological factors that influenced evolutionary pace, offering new insights into Earth's history.