The Louisville Zoo has a Dinosaur exhibit on display till October 31, 2010.  Part of the display includes an exhibit sign with a number of f...

The Louisville Zoo has a Dinosaur exhibit on display till October 31, 2010.  Part of the display includes an exhibit sign with a number o...

Recently, I visited the Essroc Quarry in Speed, Indiana with a class of geology students from a local college.  The representative gave a us...