*Hill, Carol: - Carol Hill is a geologist who has worked in the Grand Canyon and Carlsbad Cavern for over 40 years. She is the author of a number of books, and has been featured on NOVA and National Geographic TV. Her other publications include Grand Canyon: Monument to an Ancient Earth *, as senior...

*Hill, Carol: - Carol Hill is a geologist who has worked in the Grand Canyon and Carlsbad Cavern for over 40 years. She is the author of a number of books, and has been featured on NOVA and National Geographic TV. Her other publications include Grand Canyon: Monument to an Ancient Earth *, as senior editor and co-author. Carol teaches geology at the University of New Mexico.