blog posts Examining an ecosystem: 130 years in the Illinois River valley Sep 5, 2024 9:00 am by Rosalind EssigNatural History Survey Share on Facebook Tweet Email Images For 130 years, Illinois Natural History Survey scientists have been dedicated to studying the Illinois River system at the Forbes Biological Station near Havana, Illinois. Founded in 1894, it is North America’s oldest inland field station. Share on Facebook Tweet Email