Santa María Regla, in the state of Hidalgo, about an hour’s drive north of Mexico City, is the best known location in Mexico for basalt columns. The columns, up to 40 meters tall, are attractively located on the side of a canyon, with a waterfall tumbling over some of them: Basalt...
Gurcan 1 1 Center for Biomedical Informatics, Wake Forest School of Medicine, Winston-Salem, NC 27101, USA; hbinol@wakehealth.edu (H.B.); mgurcan@wakehealth.edu (M.N.G.) 2 School of Clinical Dentistry, The University of Sheffield, Sheffield S10 2TA, UK; h.mahmood@sheffield.ac.uk (...