It heats the air it zips through to five times the surface temperature of the sun. Still, around 90 percent of lightning-strike victims survive. Over the past three decades, lightning has killed an average of 51 people per year in the U.S. but left more than 500 injured and alive.
Computer vision syndrome. Computer vision syndrome (CVS) is a condition resulting from focusing the eyes on a computer or other display device for protracted, uninterrupted periods of time.
The number of computer users has increased from 5-million to 50-million in just the past 10-years, and the young age at which children begin using them has created an even larger epidemic of carpal tunnel syndrome and repetitive strain injuries.