James Farquhar was quoted in ScienceNews, September 25, on research published in Nature by Crowe et al. suggesting that that there were appreciable levels of atmospheric oxygen about 3 billion years ago, some 300-400 million years earlier than scientists thought.
![Top row: Neil M. Donahue, Dalia Kirschbaum, Juan Lora Bottom row: Tracey Holloway, Claudia Tebaldi, Ines Azevedo](https://essic.umd.edu/wp-content/uploads/2024/03/Seminar-Preview-Spring-2024-2-e1709322176365-150x150.png)