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.
A computer virus is a malicious program that infects files. The function of a virus is to either harm a computer's operating system and software, delete data or steal data and information. A trojan is a special class of virus that pretends to be legitimate software.