Mary Carmichael

Haunted By HIV's Origins

Michael Worobey, an evolutionary biologist at the University of Arizona, is a nice guy—not the sort to seek out international controversy. But last week he found himself deluged with angry e-mails, and the Haitian Embassy and Consulates across the country were fielding hundreds of equally irate phone calls about him.

The Search For Solutions

A doctor, a banker, an engineer and a scientist are working separately—and together—to bring lifesaving vaccines to children around the world. How inspired individuals can take on and conquer some of the world's biggest problems.