When astronauts return to Earth from space, they typically experience a number of physiological problems as a result of long periods of weightlessness. One of the lesser-understood health complications is known as "baby feet." This effect, which is likely to occur in NASA astronauts Sunita Williams and Butch Wilmore when they return to Earth, can make walking uncomfortable and challenging. But what is this condition, and why does it occur?
NASA, SpaceX cancel astronauts' return; new date is here
