This specimen is thought to be over 2.5 billion years old. Bacteria and algae appeared at this time in the water.  Volcanic activity pr...

Another good show to attend if you are in the Louisville, Kentucky area November 12-13, 2011. The gym of the Resurrection Lutheran Church...

This crinoid calyx was found in the Bangor Limestone of Colbert County, Alabama. The animal lived in the Mississippian (Carboniferous) ...