Health
Monday
Being in the right place at the right time, like living in the same college dorm, is a strong predictor of friendship. iStockphoto.com hide caption
Sunday
Friday
Thursday
Wednesday
These healthy newborn monkeys, Mito and Tracker, developed from embryos containing transplanted DNA. They are named after the dye "mitotracker" used for imaging mitochondria in cells. Oregon National Primate Research Center at OHSU hide caption
Sen. Edward Kennedy announced his proposal for a national health care plan at the Capitol on May 15, 1979. Behind him, large charts illustrate rising health costs in the U.S. Charles W. Harrity/AP hide caption
Exactly one year before his death, Sen. Edward Kennedy told the Democratic National Convention that guaranteed health care for every American is the "cause of my life." Robyn Beck/AFP/Getty Images hide caption