© Rob Perryman Although lots of sharks are singular animals, their manta ray family members are remarkably social: They copy one another’s motions, play together, and will even strangely... Read more »
Justin H. Turner, M.D. (Vanderbilt Image/ Lauren Holland) Older patients with a medical diagnosis of chronic sinusitis– an illness of the nasal cavity and paranasal sinuses that frequently continues... Read more »