US astronaut gets used to Earth after record-setting 371 days in space
After spending more than a year in space, Frank Rubio now has to get used to that pesky thing Earthlings call gravity. "Walking hurts a little bit the first few days, the soles of your feet and lower back," he said at a news conference Friday at NASA's Johnson Space Center in Houston, Texas. "I think there is a certain level of pain that comes with the fact that your lower back now suppo