Then, carotid artery stenosis is major cause of strokes, but most of the time, there are no signs or symptoms. On our Mayo Clinic Q&A segment, we'll talk with Dr. Luis Savastano, a Mayo Clinic neurosurgeon, to learn about early detection and new therapies.

And, can a key to health and well-being be found in spending a few hours outdoors? We'll find out from Dr. Mat White from the University of Exeter Medical School in the United Kingdom.