Three months after returning to Earth, Astronaut Scott Kelly is still feeling the effects of his year in space.
Speaking at a NASA event answering questions about his mission, Kelly described how the length of his flights determined how bad he felt after landing. His first two missions were short seven and 13 day-stays, while this 340-day mission was much longer than his third at 159 days.
"This flight was twice as long and I felt twice as bad," he told the crowd.
"After I got...