#RFB-11000272Reading: Fill in the BlanksAcademic,CoreMedium

Zero-gravity

Official Question Material
Prep: Varies

Researchers already know that spending long periods of time in a zero-gravity [blank] such as that inside the International Space Station (ISS) result in loss of bone density and [blank] to the body's [blank] . That's partly why stays aboard the ISS are [blank] at six months. And now, a number of NASA astronauts are reporting that their 20 or 30 [blank] deteriorated, after spending time in space, with many needing glasses once they [blank] to Earth.

Sample Answer & Audio Transcript

Researchers already know that spending long periods of time in a zero-gravity environment such as that inside the International Space Station (ISS) result in loss of bone density and damage to the body's muscles . That's partly why stays aboard the ISS are restricted at six months. And now, a number of NASA astronauts are reporting that their 20 or 30 vision deteriorated, after spending time in space, with many needing glasses once they returned to Earth.
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