“A black spot on your tooth shouldn’t be ignored,” says Tammy D. Duangthip, DDS, MSc, PhD, a doctor of medical dentistry at The Ohio State University College of Dentistry. There are several ...

They are large-bodied and display a mouthful of sharp teeth that protrude in all ... Sand tiger sharks are brownish-gray with rust-colored spots on top and white underneath. They have a flattened ...