Astronauts are unable to cry in the same manner as people on Earth because of microgravity. Rather, tears accumulate around the eyes and form floating blobs.
There is no gravity in space, water cannot flow downward, making traditional showers impossible. Because water sticks to surfaces in microgravity, astronauts choose shampoo and towels that don't require rinsing.
Due to safety concerns and mission protocols, astronauts are prohibited from consuming alcohol in space
Regular pens rely on gravity to draw ink towards the nib, they are useless in space. Rather, astronauts use space pens, which are specifically designed to function in microgravity and come with pressurized ink cartridges.
There is no "up" or "down" in microgravity, astronauts cannot sleep in beds like we do on Earth. Rather, they strap themselves in to prevent floating away while they sleep in specially designed sleep stations or in sleeping bags fastened to walls.
Microgravity causes fluid to redistribute in astronauts, which results in "puffy face syndrome."
The sun rises every ninety minutes in space, astronauts need sleep masks to help them sleep peacefully and maintain their circadian rhythms.