A synthetic heart remains one of the long-sought holy grails of modern medicine. Although the heart is conceptually simpleâ€”it is, in essence, a muscle that acts as a pumpâ€”it contains subtleties that defy straightforward reproduction. Though artificial hearts have been successfully implanted, they are suitable only as temporary replacements in patients awaiting transplants; no device has yet been developed for total replacement of the heart. What is the longest an artificial heart has been used?
Back in the day
Using just $1,000, college student Michael Dell founded computer company PCs Limited in 1984, offering custom-assembled computers at prices lower than those of retail brands. Although not the first company to use this business model, PCs Limited became one of the first to succeed with it, grossing more than $73 million in its first year. The company, now called Dell, Inc., ranked 34th on the 2007 Fortune 500 list. Dell lost its once-substantial lead in the PC industry to what competitor in 2006?
Born on a day like today
"Uncle Walter" served as CBS Evening News anchor from 1962 to 1981, during which time viewer opinion polls found him to be the "most trusted man in America." He reported the newsworthy events of the era so effectively that his image and voice have become closely associated with the Cuban missile crisis, the Apollo 11 Moon landing, and the Watergate scandal. Cronkite experienced a rare loss of composure during one 1963 broadcast when he found himself announcing what event?