* One million Avan years pre-modern: A greenhouse climate develops on Avo and persists until the modern epoch.  
 
* One million Avan years pre-modern: A greenhouse climate develops on Avo and persists until the modern epoch.  
 
* Pre-modern: [[The Screech]] occurs.
 
* Pre-modern: [[The Screech]] occurs.
Exception encountered, of type "Error"