Help fast if you get it right i will make you the thing 1) Tap the phrase that "it" refers
to.
Sleeping in on a Saturday morning can feel pretty great,
but pillownauts take lying in bed to another level. In order
to help NASA researchers understand what happens to
the human body when it leaves Earth pillownauts willingly
take part in studies, despite the discomfort and changes to
their bodies that they will experience. They know their
work will one day help astronauts travel as far as Mars.
Thanks to the information collected in the study of
pillownauts, the agency has solved some of the negative
effects of weightlessness on bodies. NASA installed
exercise equipment on the International Space Station
Astronauts now perform a two-hour daily workout routine.
Astronauts also wear compression socks, sleeves, and
sults. This clothing imitates gravity's pressure on their
bodies. Finally, astronauts sleep upright strapped in a
vertical bed bag, which allows blood to pool in the legs,
relieving head pressure and preventing headaches. This
makes it a very welcome item on the space station,