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In spite of my lingering vertigo, Nancy and I joined my sister and my niece for a quick trip to the Grand Canyon. The Grand Canyon cuts through many layers of rock, but the Coconino Sandstone is very different from the other layers. What makes it so different?

Drawing Life Sized Dinosaurs

I have loved dinosaurs since I was 4 years old. They lead me to my interest in science, caused me to study geology in college, and lead me to my first job as a geology instructor at the Memphis Pink Palace Museum. They were incredible creatures, ranging in size from tiny to huge. How big were dinosaurs? Here is a way that you can find out.

A New Fossil Site in Alabama

Junie Moon looking for fossils sites

On our trip home from Memphis, we took a new route across Alabama. We drove Hwy 78 to Birmingham, and then south on the interstate to Montgomery. From there, we took Hwy 231 south to I-10, and from there, it was a straight shot home. Very nice drive, with no bad traffic. They have extended Hwy 78, exposing some wonderful new road cuts. At the exit for Hwy 22, we stopped to look around.

Who Evolved on First?

Bud Abbott and Lou Costello

While I was writing this post, I heard that Bill Nye and Ken Ham are planning to have a debate about evolution and creation. While it could be an interesting conversation, I suspect that it will suffer from the same communication problems that afflict most of these debates.

What is a Rock?

The word rock means different things to different people. As with many words, its scientific meaning is different from many of the meanings used in everyday language, so lets start with a short video on the scientific definition of a rock.


The fossil shells in this photo look much like clams or oysters, but they are remains of a totally different group of organisms. What are they?