 Tune in to KNOX every Saturday from 9 to 9.30 to listen to Dr. Chalaya with the Heart Institute of North Dakota. Call in or text us with your questions regarding your heart with Dr. Chalaya every Saturday from 9 to 9.30 on 1310 KNOX. If you think Mark is wrong about an issue, remember, he's a meteorologist. I mean, his idea of accurate is 5 to 27 inches of snow. Mark Ewins, afternoons on KNOX.