+Uncategorized | December 30, 2010

Population: Is the World Ready for 7 Billion People?

By Bryan Walsh

Some time late in 2011—at least according to the people-crunchers at the U.N. Population Reference Bureau—humanity will reach a new demographic milestone with the birth of the 7th billion living person. (As a measure of just how fast global population is growing, the 6th billionth living person—Bosnian Adnan Nevic—is only 11.) You can expect the [...]

+Health | September 17, 2010

Health: Did Cities Help HIV Take Off?

By Bryan Walsh

In this week’s Science, researchers led by Michael Worobey of the University of Arizona and Preston Marx of the Tulane National Primate Research Center looked at the history of simian immunodeficiency virus (SIV)—the primate precursor to HIV—and found that the disease may be thousands of years older than scientists originally suspected. The new study estimates [...]