1. Many artists depict early Earth with volcanoes and lightning.

2. Sulfur is common, but its role in the origin of life is unclear.

3. The RNA world hypothesis suggests RNA was an early molecule of life.

4. Scientists recently figured out how to make RNA without enzymes.

5. Rock samples show there was plenty of sulfur on early Earth. production.

6. This makes it difficult to know if it was present in sufficient quantities on early Earth.

7. A new study investigates how long sulfite lasts in water.

8. Surprising Stability: Sulfite May Have Lasted Longer on Early Earth

9. The Great Disappearance: How Sunlight Affected Sulfite Levels

10. Yellowstone as a Window to the Past: Similarities to Early Earth Environments