Trouble discovered at end of 8-hour spacewalk — the longest by Russians and the fifth longest overall — after they successfully complete antenna upgrade
But scientists say findings cannot be extrapolated to humans and that current safety limits on cellphone radiation are protective
Of the 9 bears being monitored, 5 lost weight over a 10-day period
Getting large groups of people together for events during the flu season can spread the virus and increase heart attacks
Just like every other health technology, prosthetics are now able to do things that were unimaginable a few years ago. The advances are happening with the help of machine learning, but also through human ingenuity. VOA's Kevin Enochs reports.