Summary:
- Scientists at Rensselaer Polytechnic Institute (RPI) have successfully extracted and analyzed ancient air trapped inside salt crystals that are over 1.4 billion years old.
- The ancient air samples provide valuable insights into the composition of Earth's atmosphere during the Proterozoic Eon, a critical period in the planet's history when life was beginning to evolve.
- The findings suggest that the ancient atmosphere had lower oxygen levels and higher carbon dioxide levels compared to today, which helps scientists better understand the environmental conditions that supported the emergence and evolution of early life forms.