Terrifying.Aye-Eye!Scientists are still trying to understand the toll that spaceflight takes on the human body.With SpaceX’s civilian Polar Dawn mission, which lasted five days and wrapped up last month, we’re getting an opportunity to observe the effects on more or less average humans — rather than the elite, highly trained government astronauts who are normally the ones that spend so much time in orbit.Some of what they’re reporting sounds a little worrying. At the top of the list: inexplicably malfunctioning eyeballs.”My vision acuity started to deteriorate those first few days,”…
