Driving a commercial motor vehicle is a big responsibility. It requires special skills and knowledge. Most drivers must obtain a commercial driver's license (CDL) through their home State (it is illegal to have a license from more than one State). Contact your State licensing bureau (e.g., Department of Motor Vehicles) for details.
Parts of our body (eyes) function as pretty good detectors for. electromagnetic radiation in the visible-light band. Nerve endings in our skin operate as detectors for radiation in. the heat band, and our bodies as a whole transmit radiation in. the heat band. Skin pigment also responds to stimulation by ultraviolet radiation,
A new generation of high-tech eye scans can detect everything from brain tumours to heart disease. Eyes, they say, are the windows of the soul, but technological advances mean that they are rapidly becoming windows to our hearts, arteries, brain and nerves, too.