Species Discussion: Arn
The Arn were on the Hork-Bajir world when a huge cataclysm hit it, and the atmosphere became loaded down with co2. They created the Hork-Bajir to care for the big trees needed to clean the air. They're highly intelligent and scientific, but only one is left as of the books.
Sorry, Ive been shopping all day, and my brain's too tired to come up with some decent questions...gotta go sleep.