talking
interacting
walking
eating
brains
hands
muscles
legs
zero gravity
microgravity
regular gravity
it speeds up
it slows down
nothing, it stays the same
it swells with fluid before shrinking
their sense of balance doesn’t change
their sense of balance gets better
their sense of balance gets worse
lungs
stomach
legs and arms
torso and head
sleeping sickness
food poisoning
motion sickness
migraines